A General History of Iron Technology in Africa ca. 2000BC-1900AD.

The smelting and working of iron is arguably the best known among the pre-colonial technologies of Africa, and the continent is home to some of the world's oldest sites of ironworking.

Iron metallurgy was an integral component of socioeconomic life across the continent, and has played a significant role in the sociocultural, economic, and environmental spheres of many African societies, past and present, not only for utilitarian items, but also in the creation of symbolic, artistic, and ornamental objects.

The production, control, and distribution of Iron was pivotal in the rise and fall of African kingdoms and empires, the expansion of trade and cultural exchange, and the growth of military systems which ensured Africa’s autonomy until the close of the 19th century.

This article outlines the General History of Iron technologies in Africa, from the construction of the continent's oldest furnaces in antiquity to the 19th century, exploring the role of Iron in African trade, agriculture, warfare, politics, and Art traditions.

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On the invention of Iron technology in Africa.

Most studies of the history of Ironworking begin with the evolution of metallurgy in the Near Eastern societies and the transition from copper, to bronze and finally to iron. The use and spread of these metals across the eastern Mediterranean was a complex and protracted process, that was politically and culturally mediated rather than being solely determined by the physical properties of the metals.¹

Since the transition from copper to iron across most of the societies in the Near East was broadly similar, and the region was initially thought to be home to the oldest known iron-working sites, researchers surmised that iron technology had a single origin from which it subsequently spread across the old world from Asia to Europe, to Africa.

In North Africa, ironworking was only known from historical documents, it was only recently that archeological investigations have provided firmer evidence for early iron smelting in the region. This includes sites such as Bir Massouda at Carthage in Tunisia between 760-480 BCE², at Naucratis and Hamama in Egypt between 580-30BCE³, at Meroe and Hamadab in Sudan around 514 BCE⁴ and in the Fezzan region of Libya around 500BCE⁵.

Large iron slag mound at Meroe, Sudan. photo by Jane Humpris.

However, as it will become evident in the following paragraphs, the development of iron technology in the rest of Africa was independent of North African ironworking and is likely to have been a much older phenomenon. In contrast to the Maghreb, metallurgy in the rest of Africa kick-started with the simultaneous working of iron and copper between the late 3rd to early 2nd millennium BC, to be later followed by bronze, gold and other metals.

A number of radiocarbon dates within the range of 2200 to 800 BCE have since been accumulated across multiple sites. This includes sites such as; Oboui and Gbatoro in Cameroon and Central Africa, where iron furnaces, bloom fragments, slag pieces, and at least 174 iron tools were found dated to c. 2200–1965 BCE; at Ngayene in the Senegambian megaliths, where iron tools were found dated to 1362–1195 BCE; and at Gbabiri (north of Oboui) where similar iron objects and forges were found dated to 900–750 BCE.⁶

More extensive evidence for iron working in West Africa is dated to the period between 800-400 BCE, where the combined evidence for iron tools, furnaces, slag, and tuyeres was found at various places. These include the sites of Taruga and Baidesuru in the Nok culture of central Nigeria, In the northern Mandara region of Cameroon, at Dhar Nema in the Tichitt Neolithic culture of southern Mauritania, at Dia In the Inland Niger delta of Mali⁷, at Walalde in Senegal⁸, at Dekpassanware, in Togo⁹ at the Nsukka sites of Nigeria,¹⁰ and at Tora Sira Tomo in Burkina Faso¹¹, among other sites.

Slag blocks at Otobo-Dunuoka village square, Lejja, Nsukka area, Nigeria.

The subsequent spread of ironworking technology to central, East and South Africa was linked to the expansion of Bantu-speaking groups, a few centuries after they had settled in the region.¹² For the period between 800-400BC Iron working sites, are found at Otoumbi and Moanda in Gabon, at the Urewe sites of; Mutwarubona in Rwanda, Mirama III in Burundi, at Katuruka in Tanzania.¹³

By the turn of the common era, Ironworking had spread to the southeastern tip of the continent, with sites such as Matola in Mozambique and ‘Silver Leaves’ in South Africa being dated to between the 1st-2nd century CE.¹⁴ While few studies have been conducted in the northern Horn of Africa, there’s evidence for extensive use of iron tools at Bieta Giyorgis and Aksum in Ethiopia, between the late 1st millennium BC and the early centuries of the common era. ¹⁵

While proponents of an independent origin of iron technology in Africa rely on archeological evidence, the diffusionist camp is driven by the hypothesis that ironworking required pre-existing knowledge of copper smelting, they therefore surmise that it originated from Carthage or Meroe. However, there's still no material evidence for any transmission of ironworking technology based on the furnace types from either region¹⁶, and the recently confirmed dates from Cameroon, Central Africa, and Senegal significantly predate those from Meroe, the Fezzan, and Carthage.¹⁷

Furthermore, there was no contact between the earliest West African Iron Age sites of the Nok Culture with North Africa; nor was there contact between Nok and its northern neighbor; the Gajiganna culture of Lake Chad (1800-400BCE) which had no iron at its main proto-urban capital of Zilum;¹⁸ nor were there links between Carthage and Zilum during this period. Even links between more proximate regions like the Fezzan in Libya (which had Iron by 500 BCE) and the Lake Chad basin before the common era remain unproven.¹⁹

The site of Oboui in the Central African republic has been the subject of intense interest by archeometallurgists since it provides the earliest known iron-working facility anywhere in the world.

So while it may "never be possible to write a history of African metallurgy that truly satisfies the historian's inordinate greed for both generalization and specificity," the most recent research weighs heavily in favor of an independent origin of Ironworking in Africa.

1st millennium BC Nok furnace site at Janjala, Nigeria.

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The process of Smelting and Smithing Iron in African furnaces.

The process of ironworking starts with the search and acquisition of iron ores through mining and collecting, followed by the preparation of raw materials including charcoal, followed by the building of the smelting installations, furnaces, tuyeres and crucibles, followed by the smelting itself which reduces the ores to metal, followed by bloom cleaning, smithing, and the forging of the finished product²⁰. This was extremely labour-intensive and time-consuming, especially collecting the ore and fuel, which could at times last several weeks or months.²¹

In nature, iron may be found in five different compounds: oxide, hydroxide, carbide, sulfide, and silicate, of which there are many different types of iron ores in Africa (lateritic, oolitic, magnetite-ilmenite, etc) which invariably influenced the smelting technology used. Ancient African bloomery furnaces exhibit remarkable diversity, suggesting constant improvisation and innovations. As one metallurgist observed, "every conceivable method of iron production seems to have been employed in Africa, some of it quite unbelievable." African ironworkers adapted bloomery furnaces to an extraordinary range of iron ores, some of which cannot be used by modern blast furnaces and weren’t found anywhere else in the Old World.²²

African iron-smelting processes are all variants of the bloomery process, in which the air blast must be stopped periodically to remove the masses of metal (blooms), while the waste product (slag) may be tapped from the furnaces as a liquid, or may solidify within it. Most of the oldest African furnaces were shaft furnaces that ranged from small pit furnaces to massive Natural-draft smelting furnaces with tall shafts upto 7 meters high.²³

Natural draft furnaces in the Seno plain below Segue, Burkina Faso, 1957, Quai Branly. Earthen smelting furnaces in Ouahigouya, near the capital of Yatenga kingdom, Burkina Faso, 1911, Quai Branly.

Examples of African bloomery furnace types (by F. Bandama), Approximate distribution of bowl, shaft, and natural draught furnace types in Africa. (by S. Chirikure).

Bloomery smelting operates around 1200°C; ie at a temperature below the melting point of iron (1540°C), which is high enough only to melt the gangue minerals in the ore and separate them from the unmolten iron oxides. Air is introduced to the furnace either through forced draft using bellows and tuyères (ceramic pipes), or by natural draft taking advantage of prevailing winds or utilizing the chimney effect. This enables the fuel (usually charcoal) to burn, producing carbon monoxide, which reacts with the iron oxide, ultimately reducing it to form metallic iron.²⁴

These furnaces could produce cast iron and wrought iron, as well as steel, the latter of which there is sufficient evidence in several societies, most notably in the 18th-century kingdom of Yatenga between Mali and Burkina Faso, where blacksmiths built massive furnaces upto 8m high to produce steel bars and composite tools with steel-cutting edges²⁵.

Steel is iron alloyed with between 0.2% and 2% carbon, and it has been found in archaeometallurgical studies of furnaces and slag from Buhaya in northern Tanzania,²⁶ and in northern Mandara region of Cameroon among other sites.²⁷ Most high-carbon steel could be produced directly in the bloomery furnace by increasing the carbon content of the bloom, rather than by subsequent smithing as in most parts of the Old World.²⁸

Iron smelting at Oumalokho near the border of Mali & Cote d’ivoire, illustration by Louis Binger, ca. 1892.

steel sword with gold hilt, blade decorated with incised geometric and floral decoration, ca. 1900, Asante, Ghana, V&A museum

Once smelting was complete, the bloom settled to the bottom of the furnace and was removed for further refinement through repeated heating and hammering into bars using large hammerstones. After which, the iron bars produced from this process were forged at high temperatures, and the blacksmith will use various hammers, tongs, quenching bowls, and anvils to work the iron into a desired shape. In a few cases, methods like lost wax casting and the use of molds which were common in the working of gold and copper alloys were also used for iron to produce different objects, ornaments, and ingots.²⁹

Like all forms of technology, the working of Iron in Africa was socially mediated. The role of blacksmiths was considered important but their social position was rather ambiguous and varied. Depending on the society and era, they were both respected or feared, powerful or marginalized, because they wielded social power derived from access to knowledge of metallurgy, divination, peacemaking, and other salient social practices³⁰.

The smith’s craft extended from the production of the most basic of domestic tools to the creation of a corpus of inventive, diverse, and technically sophisticated vehicles of social and spiritual power The various taboos and rituals associated with the craft were a technology of practice that enabled smelters to take control of the process through learned behavior.³¹

One key feature of African metallurgy is that it resists homogenization, yet anthropologists who study the subject are more inclined to homogenize than to seek variations. In contrast to the making of pottery and sculptures, the apprenticeship of iron smelting has not been the focus of ethnological studies. While such studies can only provide us with information from the 20th century, the persistence of pre-industrial methods of iron production in some parts of the continent suggests that some of this information can be extrapolated back to earlier periods.

A number of researchers have left ethnographic descriptions of smelting sessions that they attended, observing that there is a head smelter or an elder’s council, as well as young people or apprentices. Under the leadership of a master, the metallurgists seem to take part collectively in the smelting, and the associated rituals involved in the process. Each member of a smelting session detects the physical and chemical changes of the material being processed inside the furnace.³²

Ethnographic descriptions show the major importance of smith castes and ritual practice, as well as political control over resources like iron ore, wood, land, and labour.³³ In many parts of the continent, there's extensive evidence that iron smelting was considered ritually akin to the act of procreation and therefore was carried out away from or in seclusion from women and domestic contexts³⁴. Yet there were numerous exceptions in southern and East Africa where women were allowed in the smelting area, procuring iron ores, and constructing furnaces.³⁵

Evidently, all available labour was utilized for iron working when necessary, depending on the cultural practices of a given society.

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The role of Iron in early African Agriculture and Trade.

Ironworking played a pivotal role in the advent and evolution of agriculture and long-distance trade across the African continent, as the widespread use of iron tools helped to increase food production and the exchanges of surpluses between different groups. In many societies, the various types of iron tools (such as plows and hoes) the design of furnaces, and the organization of labor, influenced and were influenced by developments in agriculture, trade, and cultural exchanges.³⁶

For example, the use of natural draught furnaces and the creation of a caste of blacksmiths frees up labour for working the raw iron to make iron objects and develop long-distance trade and exchange. Such high- fuel low-labour furnaces were particularly common in the West African Sudanic woodland zone from Senegal to Nigeria and in the miombo woodlands of Tanzania, Zambia, Malawi and Mozambique, where labour requirements for swidden agriculture may have reduced available labour for smithing.³⁷

Natural draft furnaces; Yeke, D.R.Congo, early 20th century, Royal Museum for Central Africa. ‘A Bafipa natural draft furnace in Tanzania’, photo by S.T.Childs. Aushi, Zambia, early 20th century, British Museum.

In other regions, the demand for Iron objects beyond the immediate society in which specialist smiths lived facilitated the production of large quantities of Iron for export. For example, at least 15 sites used by Dogon smiths in south-central Mali produced a about 400,000 tonnes of slag – or 40,000 tonnes of iron objects over a period of 1,400 years, which is about 26 tones of iron objects per year; while the site of Korsimoro (Burkina Faso) yielded 200,000 tonnes of slag - or 20,000 tonnes of iron objects between 1000-1500 CE, which is about 32 tonnes of iron per year.³⁸

This scale of production doubtlessly suggests that the iron was intended for export to neighboring societies, albeit not at a scale associated with large states. For example, the dramatic rise in iron production from a small site of Bandjeli in Togo, from less than a tonne in the 18th century to over 14 tones per year by 1900 may have been associated with demand from sections of the kingdoms of Dagomba, Gonja, Mamprusi, although it was far from the only site³⁹.

It therefore appears that in most parts of Africa, specialization was based on pooling together surplus from various relatively small-scale industries which cumulatively produced bigger output, and may not have been concentrated even in the case of large states.⁴⁰

Several types of iron objects served as convenient stores of wealth and were at times used as secondary currencies in some contexts, primarily because of the ever-present demand for domestic and agricultural iron implements like hoes, knives, machetes, harpoons, as well as the general use of metals for tribute, social ceremonies, and trade.⁴¹

In West Africa, iron blooms were traded and kept as heirlooms, while knives and iron hoes were both a trade item and a medium of exchange in parts of Southern Africa and west-central Africa⁴². In East Africa, where long-distance traders like the 19th century Swahili traveler Mwenyi Chande were required by local rulers to give iron hoes as a form of tax on their return journeys from the interior as a substitute for cowries and cloth. Similary In Ethiopia, iron plowshares were valued items of trade.⁴³

Illustration depicting an ‘Abyssinian Plough’. ca. 1868, Library of Congress.

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Iron in the History of Warfare and Politics in Pre-colonial Africa.

Given its centrality in agriculture and trade, the spread of iron working in Africa was closely associated with the emergence and growth of complex societies across the continent.

The rise of African states resulted in an increased demand for symbols of prestige and power, among which iron, copper, and gold were prominent. Increase in metal production and changes in furnace construction in the Great Lakes region for example, were associated with the emergence of the kingdoms of Bunyoro, Buganda, and Nyiginya (Rwanda),⁴⁴ and similar developments in southern Africa and the East African coast were associated with the rise of the kingdoms at Great Zimbabwe and Kilwa.⁴⁵

A significant number of iron tools found at the oldest sites of ironworking across the continent included knives and arrowheads. Additionally, a number of historical traditions of societies in central Africa like the kingdom of Ndongo and Luba, either attribute or closely associate the founding of kingdoms to iron-wielding warrior-kings and blacksmiths⁴⁶. Iron was often conceptually integrated within the organizing structures of these states, with iron symbolism frequently incorporated within iconography, mythology, and systems of tribute payment, all of which underscores the importance of iron weapons to the emergence and expansion of African kingdoms and empires, especially in warfare.⁴⁷

Sword made by a Ngala smith from Congo, Copper alloy handle with iron struts attached to iron blade, Late 19th century, Saint Louis art museum

Iron Sword, 19th century, Asante Kingdom, Ghana, British Museum

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The history of African military systems has been sufficiently explored and is too diverse to summarise here, but it suffices to say that the majority of weapons were made locally and most of them were made of Iron. The provision of weapons and the distribution of power were often strongly correlated, especially in larger complex societies where rulers retained large arsenals of weapons to distribute to their armies during times of war, and maintained a workforce of blacksmiths to provide these weapons.⁴⁸

In most parts of the continent, blacksmiths were numerous and usually worked in closely organized kin guilds associated with centers of political power, where rulers acted as their patrons, receiving protection and supplies in exchange for providing armies with swords, lance heads, chainmail, helmets, arrow points and throwing knives. In some exceptional cases, a few of these items were imported by wealthy rulers and subsequently reworked by local smiths to be kept as prestige items.⁴⁹

Among the most common iron objects in African ethnographic collections are the two-edged straight or gently tapering sword, which was common in West Africa⁵⁰, as well as in most parts of central Africa, North-East Africa and the East African coast. Other collections include curved blades and throwing weapons with multiple ends, as well as axes, arrowheads, and javelin points.

sword with Iron blade, sheath decorated with plant and zoomorphic motifs, 19th century, Dahomey, Benin. Musée d'ethnographie, Genève. Iron and Ivory sword, undated, Kongo, Angola/D.R.Congo, Brooklyn Museum, Curved Iron sword, Mangbetu, D.R.Congo, British Museum. Iron blades made by Ekonda smiths, late 19th century, D.R.C, Smithsonian museum

By the 18th century, swords and lances had largely fallen out of use in the regions close to the Atlantic coast and were replaced by muskets.⁵¹ The repair of guns and cannons, as well as the manufacture of iron bullets was also undertaken across many societies⁵², from Asante and Dahomey, to Zulu and Buganda. The casting of brass and iron cannons, in particular, was attested in many parts of West Africa, most notably in the 16th-century kingdoms of Benin and Bornu, where such gunpowder technology in Africa was first attested, as well as in the 19th-century sultanate of Damagaram. Benin in particular is known to have made a number of firearms, some of which appear in western museum collections.

Firearm made of Brass and Iron, ca. 18th century, Benin City, Nigeria, National Museum, Benin. Firearm made of Iron and Wood, ca. 18th century, Benin City, Nigeria, National Museum, Benin.

The complete manufacture of firearms was accomplished in some societies during the 19th century such as the empire of Samori Ture, the Merina kingdom of Madagascar and the Ethiopian Empire under Tewodros⁵³. In the 1880s Samori concentrated 300-400 ironworkers in the village of Tete where they succeeded in manufacturing flintlocks at a cost lower than the price paid for those bought from Freetown. Tete was evacuated in 1892 and its armament workers were reassembled at Dabakol under the direction of an artificer who had spent several months in a French arsenal. They succeeded in making effective copies of Kropatschek repeating rifles at a rate of two of these guns per day.⁵⁴

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Iron in the making of African Art and Culture.

According to Cyril Stanley Smith, a founding father of archaeometallurgy, "aesthetic curiosity" was the original driving force of technological development everywhere, and the human desire for pretty things like jewelry and sculpture, rather than for "useful" objects such as tools and weapons, first led enterprising individuals to discover new materials, processes, and structures.⁵⁵

While many of the oldest iron tools found in the ancient metallurgical centers of Africa were agricultural implements and weapons, a number of them also included small caches of jewelry in the form of bracelets and anklets. Later sites include Iron ornaments such as earrings, earplugs, and nose rings. African jewelry made from metal primarily consisted of gold, copper alloys, and silver, with iron being relatively uncommon. However, there are a few notable exceptions such as the kingdom of Dahomey, where skilled blacksmiths produced a remarkable corpus of sculptural artworks made of Iron called asen.

Historically, asen were also closely identified with the belief systems of the Vodun religion and practices. Following the rise of the Dahomey kingdom, their function shifted toward a more specifically royal memorial use as each king was identified with a distinct asen. These royal asen were brought out during annual “custom” rites, placed near the djeho (spirit house of the king), and given libations while fixed in the ground using long iron stems. The asens feature figurative scenes depicting processions of titled persons in excellent detail, at the end of which are placed togbe pendants around the edge of the platform.⁵⁶

Various Asen representing the Yovogan of Dahomey, from the mid-late 19th century, Benin,. New Orleans museum, Barbier Mueller museum, Museum of Fine arts.

Iron sculptures from Dahomey; figure of the Fon deity Gu holding up a sword, late 19th century, private collection. Asen altar with birds on a tree, early 20th century, Fowler Museum.

Iron sculptures and other artifacts made of composite materials that include iron are attested across multiple African art traditions, from West African figures made by the Yoruba of south-western Nigeria, as well as the Dogon and Mande of Mali, to the composite wood-and-iron sculptures of West central Africa, to the musical instruments of central and southern Africa, such as thumb pianos and rattles of the Chokwe artists of Angola and D.R.Congo.

Iron sculptures of Yoruba artists, Opa Osanyín staff, 19th century, private collection. Rainmaking vessel, mid-20th century, Fowler Museum.

composite iron and wood artefacts by the Chokwe; Lamellophone (chisanji), ca. 1890, Angola/D.R.Congo, Musical Instrument Museum, Phoenix. Thumb piano with an equestrian figure, 19th century, Angola/D.R.Congo, Cleveland Museum

The smelting of Iron in Africa gradually declined in the 20th century as local demand was increasingly met by industrial iron and steel, but smithing continues across most parts of the continent. This shift from smelting to smithing began in some coastal regions significantly earlier than on the African mainland, where smelting persisted well into the post-colonial era.⁵⁷

In response to shifts in local economies during the colonial and post-colonial era, African blacksmiths began incorporating salvaged materials into their work through creative recycling. Blacksmiths continue to serve as technology brokers who transform one object into another— truck wheels become bells and gongs; leaf springs from cars become axes and asen in Benin; and bicycle spokes become thumb pianos in western Zambia. Today, smiths forge work to accommodate new contexts and purposes. For example in southern Nigeria, where the Yorùbá deity of iron, Ògún, has become the patron of automobiles, laptops, and cell phones.⁵⁸

Iron continues to play a central role in the development of African societies, a product of centuries of innovations and developments in one of the continent’s oldest technologies.

man carrying a massive sword dedicated to Gu; the god of iron and war. ca. 1950 Abomey, Benin, Quai Branly.

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Recent archeological research has uncovered a series of stone complexes in the Mandara mountains of Cameroon which historical documents from the region associate with the expansion of complex societies and empires at the end of the Middle Ages.

Please subscribe to read about the DGB ruins and the Mandara kingdom here:

1. Metals in Past Societies: A Global Perspective on Indigenous African Metallurgy By Shadreck Chirikure pg 20-23)

2. Ferrous metallurgy from the Bir Massouda metallurgical precinct at Phoenician and Punic Carthage and the beginning of the North African Iron Age by Brett Kaufman et al.

3. Ancient Mining and Smelting Activities in the Wadi Abu Gerida Area, Central Eastern Desert, Egypt: Preliminary Results by Mai Rifai, Yasser Abd El-Rahman, Metals in Past Societies: A Global Perspective on Indigenous African Metallurgy By Shadreck Chirikure pg 71,

4. Investigating the ironworking remains in the Royal City of Meroe , Sudan by Chris Carey, The ancient iron mines of Meroe by Jane Humphris et al., A New Radiocarbon Chronology for Ancient Iron Production in the Meroe Region of Sudan by Jane Humphris, Metals in Past Societies: A Global Perspective on Indigenous African Metallurgy By Shadreck Chirikure pg 72

5. Mobile Technologies in the Ancient Sahara and Beyond edited by C. N. Duckworth, A. Cuénod, D. J. Mattingly pg 239)

6. Preindustrial Mining and Metallurgy in Africa by F Bandama pg 6, The Origins of African Metallurgies by A.F.C. Holl pg 7-8, 12-13, 21-31)

7. Mobile Technologies in the Ancient Sahara and Beyond edited by C. N. Duckworth, A. Cuénod, D. J. Mattingly pg 238)

8. Excavations at Walalde: New Light on the Settlement of the Middle Senegal Valley by Iron-Using People by A Deme

9. The Early Iron Metallurgy of Bassar, Togo: furnaces, metallurgical remains and iron objects by PL de Barros

10. Lejja archaeological site, Southeastern Nigeria and its potential for archaeological science research by Pamela Ifeoma Eze-Uzomaka et. al.

11. Iron metallurgy in West Africa: An Early Iron smelting site in the Mouhoun Bend, Burkina Faso by Augustin Ferdinand Charles Holl

12. Indigenous African Metallurgy: Nature and Culture by S. Terry Childs pg 321-322

13. The Archaeology of Africa: Food, Metals and Towns edited by Bassey Andah, Alex Okpoko, Thurstan Shaw, Paul Sinclair pg 302-306, Our Iron Smelting 14C Dates from Central Africa: From a Plain Appointment to a Full Blown Relationship" by Bernard Clist, A critical reappraisal of the chronological framework of the early Urewe Iron Age industry by Bernard Clist.

14. Metals in Past Societies: A Global Perspective on Indigenous African Metallurgy By Shadreck Chirikure pg 22.

15. Foundations of an African Civilisation by D. Philipson pg 142, 166-167.

16. Book review essay: What do we know about African iron working? by D. Killick pg 107

17. The Origins of African Metallurgies by A.F.C. Holl pg 4, Metals in Past Societies: A Global Perspective on Indigenous African Metallurgy By Shadreck Chirikure pg 25

18. Zilum: a mid-first millennium BC fortified settlement by C Magnavita pg 166-167

19. Urbanisation and State Formation in the Ancient Sahara and Beyond by Martin Sterry, ‎David J. Mattingly pg 516, Landscapes, Sources and Intellectual Projects of the West African Past: Essays in Honour of Paulo Fernando de Moraes Farias pg 25-32)

20. The Archaeology of Africa: Food, Metals and Towns pg 333-334

21. The Social Context of Iron Forging on the Kenya Coast by Chapurukha M. Kusimba pg 401-402)

22. Did They or Didn't They Invent It? Iron in Sub-Saharan Africa by Stanley B. Alpern pg 85, Mobile Technologies in the Ancient Sahara and Beyond edited by C. N. Duckworth, A. Cuénod, D. J. Mattingly pg 292-294)

23. Invention and Innovation in African Iron-smelting Technologies by David J Killick pg 312-313)

24. African Iron Production and Iron-Working Technologies pg 2-3

25. Book review essay: What do we know about African iron working? by D. Killick pg 108

26. Cairo to Cape: The Spread of Metallurgy Through Eastern and Southern Africa by D. Killick pg 408

27. Metals in Mandara Mountains Society and Culture edited by Nicholas David pg 12-13, 174.

28. Did They or Didn't They Invent It? Iron in Sub-Saharan Africa by Stanley B. Alpern pg 87, Preindustrial Mining and Metallurgy in Africa by F Bandama pg 11)

29. Preindustrial Mining and Metallurgy in Africa by F Bandama pg 12, African Iron Production and Iron-Working Technologies pg 4-5.

30. The Social Context of Iron Forging on the Kenya Coast by Chapurukha M. Kusimba, 386, Style, Technology, and Iron Smelting Furnaces in Bantu-Speaking Africa by S. Terry Childs pg 343-345

31. Metals in Past Societies: A Global Perspective on Indigenous African Metallurgy By Shadreck Chirikure pg 10, Indigenous African Metallurgy: Nature and Culture by S. Terry Childs pg 325-326, Warfare in Pre-Colonial Africa by C. G. Chidume et al pg 75-76

32. Mobile Technologies in the Ancient Sahara and Beyond edited by C. N. Duckworth, A. Cuénod, D. J. Mattingly 303-304, The Social Context of Iron Forging on the Kenya Coast by Chapurukha M. Kusimba, pg 390-393)

33. Mobile Technologies in the Ancient Sahara and Beyond edited by C. N. Duckworth, A. Cuénod, D. J. Mattingly pg 295-302)

34. Indigenous African Metallurgy: Nature and Culture by S. Terry Childs pg 327-328

35. Preindustrial Mining and Metallurgy in Africa by F Bandama pg 13-14, When the smith is a woman: innovation, improvisation and ambiguity in the organisation of African iron metallurgy by Ezekiel Mtetwa et. al.

36. How Societies Are Born by Jan Vansina pg 65-66, 79-81.

37. Invention and Innovation in African Iron-smelting Technologies by David J Killick pg 314-316)

38. Mobile Technologies in the Ancient Sahara and Beyond edited by C. N. Duckworth, A. Cuénod, D. J. Mattingly pg 302, 305)

39. A Comparison of Early and Later Iron Age Societies in the Bassar Region of Togo Philip de Barros pg 10-11

40. A technological and anthropological study of iron production in Venda, Limpopo Province, South Africa by Eric Ndivhuwo Mathoho pg 18, Early metallurgy and surplus without states in Africa south of the Sahara by Shadreck Chirikure

41. Indigenous African Metallurgy: Nature and Culture by S. Terry Childs pg 332-333

42. Preindustrial Mining and Metallurgy in Africa Foreman Bandama pg 12, How Societies Are Born by Jan Vansina pg 126-127, 154-155

43. People of the Plow: An Agricultural History of Ethiopia, 1800–1990 By James McCann pg 130

44. Indigenous African Metallurgy: Nature and Culture by S. Terry Childs pg 330-331, Pre-colonial iron production in Great Lakes Africa by Louise Iles pg 60-63

45. Innovation, Tradition and Metals at Kilwa Kisiwani by Stephanie Wynne-Jones

46. Blacksmiths of Ilamba: A Social History of Labor at the Nova Oeiras Iron Foundry (Angola, 18th Century) by Crislayne Alfagali

47. Pre-colonial iron production in Great Lakes Africa by Louise Iles pg 58-60, Paths in the rainforests by Jan Vansina pg 60-61,

48. Warfare & Diplomacy in Pre-colonial West Africa by Robert Sidney Smith pg 92, 101, Warfare in Pre-Colonial Africa by C. G. Chidume et al pg 78-79.

49. Warfare & Diplomacy in Pre-colonial West Africa by Robert Sidney Smith pg 90-91, 103-105)

50. Warfare & Diplomacy in Pre-colonial West Africa by Robert Sidney Smith pg 93-94)

51. Warfare & Diplomacy in Pre-colonial West Africa by Robert Sidney Smith pg 107-108)

52. Warfare & Diplomacy in Pre-colonial West Africa by Robert Sidney Smith pg 116)

53. Africa and the Indian Ocean World from Early Times to Circa 1900 by Gwyn Campbell pg 202-208

54. Warfare & Diplomacy in Pre-colonial West Africa by Robert Sidney Smith pg 116

55. Did They or Didn't They Invent It? Iron in Sub-Saharan Africa by Stanley B. Alpern pg 87)

56. Asen: Dahomey history, and Forged memories of Iron by S. Blier, Asen: Identifying Form, Style and Artists by S. Blier.

57. The Social Context of Iron Forging on the Kenya Coast by Chapurukha M. Kusimba pg 400-401

58. Striking Iron The Art of African Blacksmiths by Allen F. Roberts and Marla C. Berns