The role of arsenic in Chalcolithic copper artefacts – insights from Vila Nova de São Pedro (Portugal)

The Castro of Vila Nova de São Pedro (VNSP) is an emblematic settlement located at Azambuja, Portuguese Estremadura. It was occupied during the third and second millennia BC, predominantly during the Chalcolithic period. A diversified collection of 53 copper-based artefacts (most part in a fragmentary condition), belonging to an extensive metallic collection recovered during excavations carried out in VNSP, was studied using micro-EDXRF spectrometry, optical microscopy and SEM-EDS. Additionally, Vickers microhardness measurements were performed to establish the effectiveness of the thermomechanical treatment in the hardness of the artefacts. Results show that the Largo do Carmo, artefact collection is mainly composed of copper or arsenical copper, being 37% of the artefacts made of copper alloyed with arsenic (As > 2%). A statistically significant association was found between copper alloyed with arsenic and artefacts classified as tools/weapons (arrowheads, daggers and knives). In several cases, the presence of arsenic rich phases in the microstructure, resulting from an inverse segregation phenomenon, shows no evidence of chemical homogeneity control during the artefact manufacture. Microstructural analyses also show that the majority of this group (73%) was shaped with forging plus annealing operation cycles and 23% of the artefacts received a final cold hammering after the forging and annealing. An association between the presence of a final forging treatment and artefacts presenting higher arsenic contents was also identified. Nevertheless, no direct correlation was found between the arsenic content of the alloy and its hardness. Also no direct correlation was found between the hardness and a final forging operation. However, it was observed that a harder forging was applied to the cutting edge of the artefacts and consequently a high hardness in this area was obtained despite the arsenic content of the alloy. Concerning arsenical copper alloys, all evidences point out that the potential for obtaining a harder material was not recognized by the ancient metallurgists and the selection of the alloy was possibly made based on colour.     

Touchstones of archaeology

European archaeological collections record hundreds of thousands of stone artefacts from the Early Middle Ages described as whetstones. However, traces of non-ferrous metals, including precious metals preserved on a number of such artefacts. Many of the finds served in fact as touchstones – tools to test the quality of a particular metal. These artefacts are concentrated mainly in Vendel and Viking Age and Slavic coastal settlements and trade centres in the Baltic Sea basin, the coast and islands of Northwestern Europe, at Central and Eastern European fortresses and suburbia. Many finds also come from rural settings. In early medieval graves the touchstones join balance scales and weights as a sign of the buried individual’s access to precious metals. Especially the rural finds with traces of precious metal provide a strong reason for a revision of present views on the social stratification of the early medieval society in Europe. Chemical microanalysis allows identifying the composition of the alloys. Besides new perspectives on the fields of the social history and the circulation of precious metals, the method also provides new information for the field of archaeometallurgy.     

Archaeology and the Irish rediscovery of the Celtic past

This article examines the place of archaeology in the second wave of Irish cultural nationalism, and how archaeological findings were appropriated by rival ethno‐religious communities in Ireland. In particular, it focuses on George Petrie, who was the founder of ‘scientific’ archaeology and was also one of the leading figures in the nineteenth‐century Celtic revival that sought a moral regeneration of the Irish nation In Ireland, as elsewhere, archaeology was important in reconstructing an early history of the nation where few written records existed and in making this visible through material artefacts. However, archaeology was only significant as part of a wider cultural revival that presented artefacts and sites as national symbols to an island undergoing rapid social change. This article will explore the relationship between archaeology and this national revival, and how the material objects recovered by archaeologists extended and transformed the existing repertoires of how the nation was imagined and felt. It will assess the different reception of these images in the rival Catholic and Protestant communities. Finally, it will comment on the capacity of a medieval ‘Celtic’ repertoire to provide the basis of a dynamic modern Irish national culture.     

Agricultural brokers

Pigs worked as brokers of agrarian life in the early medieval west in two ways. First, they converted organisms and spaces that humans did not directly exploit into a ‘commodity’ that humans did value. And the material work that pigs did made possible a second kind of brokerage, this one conceptual: the animals facilitated (or provoked) ways of seeing local phenomena in the context of wider ecological and social systems. Pigs’ ability to make use of a range of habitats, and humans’ interest in exploiting that work despite the trouble that pigs routinely caused, demonstrated that seemingly small things could influence and illuminate early medieval economies, social status, justice, and even metaphysics.     

On Some Remains of the Work of William of Wykham,at Windsor Castle

Scholarly opinion on the character and timing of the end of Roman Britain remains deeply divided. The evidence presented by those favouring a ‘long chronology’ is seriously flawed. ‘Continuity’ or ‘survival’ of Roman Britain is claimed because early medieval activity is attested on some former Roman sites and some early medieval artefacts are of Roman type. But Roman Britain was part of a ‘world system’ with a distinctive and rich archaeological assemblage, and once terms are properly defined and material analysed quantitatively, the argument for fifth-century continuity collapses. The archaeological evidence shows that after a long process of decline beginning in the third century, Roman Britain had ended by c. A.D. 400.     

The function of Chalcolithic metalwork in Italy: an assessment based on use-wear analysis

This paper presents results of the use-wear analysis of Chalcolithic copper-base metalwork from the Italian peninsula. Previous research led to contrasting scholarly opinions regarding the function of early metal axes, daggers and halberds from this region. Whilst some authors interpreted these objects as utilitarian tools and weapons, others saw them as symbolic signifiers of social status and personhood. The analysis conducted here shows that this is a false dichotomy as all classes of metalwork seem to embody to some extent both utilitarian and non-utilitarian values. In particular, axes were primarily used for woodworking and other practical tasks, but were mostly withdrawn from circulation when still usable. This suggests that deposition practices bore a loose relationship, if any, with the functional value of the tools. Daggers were employed in a range of symbolically charged practices that left little wear on cutting edges. These probably included the sacrificial slaughtering and skinning of large animals such as cattle and horses. Halberds were utilised as weapons in champion’s duels in which display of combative skills and prowess would have been far more important than killing the opponent. This explains the relatively low rate of damaged blades in the record. Regardless of their practical function in lifetime settings, these objects were all similarly employed in burial to reproduce core social values such as gender and age. Importantly, this study contributes to debunking undemonstrated assumptions concerning the function of early metalwork in European prehistory. It also defines a replicable analytical protocol for the use-wear analysis of ancient copper-alloy artefacts.     

安徽南陵出土部分青铜器研究

安徽省南陵县是长江下游地区最早而且规模最大的冶炼中心之一,其古代矿冶遗址可上溯至西周晚期。本研究对南陵出土的不同年代和类别的青铜器样品进行了金相检测及合金成分定量分析。结果表明,只有容器存在铜铅二元合金和铜锡铅三元合金,但是热锻淬火的容器却不含铅,含锡量恰好位于适合该工艺操作并具有良好性能的区间。兵器、工具、车马饰均为铜锡二元合金,说明当时的工匠对于合金成分配比与性能的关系有明确的认识。越式鼎腹部样品具有热锻淬火马氏体组织,同样的金属结构还见于汉代铜锣等乐器、峡江地区战国中晚期青铜剑、江都大桥镇南朝青铜器窖藏出土的多件青铜容器,而镇江地区出土吴国青铜戈则具有铸造淬火组织,工艺稍有差别。这些器物中发现高锡青铜淬火组织不是偶然的,高锡青铜热锻淬火技术至少可以上溯至春秋战国时期,用以改善高锡青铜的机械性能。     

The spatial and gendered politics of displaying family: exploring material cultures in grandfathers’ homes

This article analyses the meaning that 27 men who are grandfathers ascribed to the domestic material cultures of their homes, during an exploratory study that investigated their contemporary social and cultural geographies. In recounting stories about a number of items and artefacts placed about their homes during the interviews, that they specifically related to their experiences as grandfathers, the men provided insight into the various ways in which ageing men position themselves in ambivalent ways in relation to cultural stereotypes about grandparenthood, masculinities and ageing. Moving beyond the surface of the objects on display, their discussions also revealed the complex ways in which the material cultures of their homespaces are shaped by, and reproduce, diverse family relationships and their associated politics. The article contributes to, and bridges agendas in social and cultural geography that examine the relationship between the shifting meanings of home for older men, the politics of attending to the material and both the family and older masculine identities as spatial projects.     

The Silversmith's Workshop of Tira Del Lienzo (Totana,Murcia) In The Context of Iberian Bronze Age Metallurgy

The south‐east of the Iberian Peninsula saw deep social and political changes at the dawn of the second millennium bce . The emergence of important economic asymmetries inside communities was apparently based to a large extent on control of the secondary metallurgical production process; namely, forging. In this sense, the recently excavated architectural complex at the Argaric site of Tira del Lienzo constitutes an exceptional finding. At this site a series of macrolithic artefacts were recorded, which were related to the forging of metals and, more specifically, to the working of silver, according to morpho‐technological and functional studies (use‐wear and residue analysis).     

山西定襄中霍墓地出土铜器的初步科学分析

中霍墓地出土青铜器是研究春秋晚期和战国早期青铜文化特征、制作技术以及探讨该时期中原和北方少数民族相互关系等学术问题的重要资料。为进一步揭示该墓地出土青铜器所包含的科学信息,对该墓地出土17件铜器的37个样品进行了科学分析检测。结果显示,这批青铜器的制作工艺以铸造为主,另外还有热锻、热锻后冷加工等;其合金成分有铜锡二元合金和铜锡铅三元合金两种,铜锡二元合金全部用于制作工具,铜锡铅三元合金用于制造容器。这显示中霍墓地铜器的合金成分和器物类型之间的关系明显,表明制作者已经能根据青铜器的用途而选择合适的制作材料。研究结果对研究中原和北方少数民族冶金术及在此基础上的文化交流有较大的指示性意义。     

Clerical "concubines" in northern Italy during the fourteenth century

This essay reconstructs the lives of a neglected group of women in the Christian church during the later Middle Ages. So-called clerical “concubines” were well-known in their communities, but their lived experience has been largely ignored by modern historians. Yet studying clerical concubines sheds light not only on the women themselves, but also on the social organization of the medieval Christian church. Drawing on information gathered from notarial acts across the northern Italian peninsula, I argue that concubines were not a unitary group. Their experiences varied instead according to their status and the regions they inhabited. For instance, while laywomen who became priests’ concubines moved into their lovers’ homes, nuns retained cells in their religious houses during these relationships. Furthermore, concubines in cities such as Treviso could openly live with their lovers and share their property, while in other places, such as Bergamo, severe legal restrictions on concubines made them a particularly vulnerable group.     

METALLURGY OF BRONZE USED IN TOOLS FROM MACHU PICCHU,PERU*

Although the tin‐bronze artisans’ tools found at Machu Picchu appear to have been cast to their final shape, examination of their microstructures shows that they were forged and annealed. As found, the tools were broken or cracked due to poor ductility of the bronze. Rolling and annealing of samples of bronze formulated with sulphur and iron additions to replicate the metal used at Machu Picchu show that the minimum amount of deformation needed to induce the observed recrystallization is a 12% reduction in thickness. The sulphur and iron impurities retard nucleation of new grains during annealing, but do not inhibit subsequent grain growth. Tensile tests show that while up to 10% porosity in cast bronze has no effect on hardness or initial strain‐hardening rate, it reduces the tensile strength and ductility enough to embrittle the metal. Hardness is an inadequate indicator of the strength properties of cast bronze intended for use in tools or weapons. The results show that when the metalsmiths at Machu Picchu started making bronze tools for use by stone and woodworkers, they had not mastered the art of making metal with adequate strength properties for this service. The forging and annealing procedure they used did not enhance the mechanical properties of their tools, and may reflect an inherited metallurgical tradition.     

Functional,symbolic or ritual?

Tools for determining the value of metal appear as symbols among grave goods in prehistoric and early medieval Europe and the Near East. Also, five boat burials excavated in eponymous Vendel contained touchstones. This article presents the results of chemical microanalyses of metal traces preserved on them and discusses the linear streaks of zinc in light of extraordinary ore deposits in central Sweden, exploited as early as the Early Middle Ages. In addition, forging tools found in four boat burials in Vendel are interpreted as symbols belonging to the funerary assemblages of ancient leaders. However, although both forging tools and tools for determining the value of metal were used in the treatment of metal, it would be misleading to search for their functional connection. They are linked in prehistoric and early medieval graves exclusively by their function as a symbol, one which they share with other objects, regardless whether exclusive or common.     

A NOVEL APPROACH TO STUDIES OF PREHISTORIC EXPLOITATION OF STONE TOOL MATERIALS USING MATERIAL COMPOSITION,SURFACE MORPHOLOGY,MICROSTRUCTURE AND MECHANICAL PROPERTIES*

For a comprehensive understanding of material exploitation in prehistory, we applied advanced analytical methods to Japanese prehistoric stone tool materials. Compositions, surface morphologies, microstructures and mechanical properties of the primary lithic materials were analysed. As a result of the tests on actual Palaeolithic artefacts, preferential material selection was observed based on composition, structure and other physical properties of the materials. Homogeneous materials composed of a single type of mineral—α‐quartz—were intentionally selected for Palaeolithic tools regardless of the type of rock. These materials unexceptionally present higher hardness and strength. Moreover, materials composed of extremely fine crystal grains of ~0.1 µm in size with highest hardness and strength were selectively used for sharp‐edged blades. These results lead us to the conclusion that quantitative and objective analyses will give us precise information on prehistoric materials, which will enable us to make an analytical approach to the comprehension of prehistoric exploitation of stone materials. This could eventually complement the traditional interpretation of material exploitation based on conventional petrological classifications.     

Ancestral memories and early medieval landscapes: the case of Sierra de Ávila (Spain)

This paper focuses on early medieval funerary practices from a landscape perspective in central Iberia. Rock‐dug graves constitute the most conspicuous remains in this region, but their informative potential has not yet been realized. The preliminary outcomes of an ongoing research project are presented here. This aims to contextualize such funerary cases by examining a mid‐altitude mountain study‐area. Through the use of intensive archaeological surveying and geographic information systems, the paper characterizes two basic funerary types: isolated graves and rural disordered cemeteries, which responded to two social strategies led by local households. By recalling ancestorship, they constituted effective mnemonic resources, contributing to claiming rights and forging identities among these dispersed and predominantly small‐scale herding communities.     

BLACKSMITHING TECHNOLOGY IN IRON AGE WESSEX

Summary. The sophistication of Iron Age blacksmithing technology in Wessex was determined by the metallurgical examination of 503 iron artefacts using Optical Metallography, Electron Microprobe Analysis and Vickers Hardness Testing. Iron artefacts from the different regions and site types of Southern Britain were examined to determine both the capabilities of Iron Age blacksmiths to alter the properties of iron artefacts through cold-working, carburization, heat-treatment and alloy selection, and the distribution of these possible techniques. The reasons for the selection of the areas, the sites, and the actual artefacts chosen for examination are discussed.     

Khao Sam Kaeo – an archaeometallurgical crossroads for trans-asiatic technological traditions

Recent archaeological investigations at Khao Sam Kaeo, on the Upper Thai-Malay Peninsula, have furnished evidence for a mid/late 1st millennium BCE cultural exchange network stretching from the Indian subcontinent to Taiwan. Typological, compositional and technological study of Khao Sam Kaeo's copper-base artefacts has identified three distinct copper-alloy metallurgical traditions, with reasonable analogies in South Asian, Vietnamese, and Western Han material culture. Furthermore, analyses of technical ceramic and slag suggest that Khao Sam Kaeo metalworkers may have been using a cassiterite cementation process to produce high-tin bronze ingots for export or onsite casting/forging. Not only would this industry constitute the earliest evidence for the exploitation of Peninsula tin resources, but we also offer a speculative argument for the source of Khao Sam Kaeo's copper-base production technology.     

EARLY MEDIEVAL WEAPONS IN THE NORTH CAUCASUS – A PRELIMINARY REVIEW

The early medieval weapons [of sixth to ninth centuries] which have been found in cemeteries in the northern Caucasus are given a preliminary classification. The implications for the contacts between peoples and for their changing mode of warfare are discussed.     

Technologies of Appearance: Hair Behaviour in Early Medieval Europe

Personal appearance in general—and the grooming of hair in particular—has long held a position of interest in historical, art-historical, and literary scholarship. The same cannot be said of archaeology, and the material aspects of personal grooming in the construction and communication of identity have not been fully synthesized. As a result, little attempt has been made to understand the social role of hair in less well documented societies, such as those of early medieval northern and western Europe. This paper considers archaeological, iconographic and documentary evidence for the significance of, and physical engagement with hair in early medieval northern and western Europe, and offers a model for the interpretation of grooming as a social phenomenon. It is argued that grooming was a socially meaningful practice, and that it played a key role in the construction of early medieval identities, as well as in the maintenance and manipulation of boundaries and distinctions between individuals and groups.     

UNRETOUCHED BLADES IN THE LATE MESOLITHIC OF SOUTH SCANDINAVIA. A FUNCTIONAL STUDY

Summary. While most microwear analyses of flint artefacts have involved formal retouched tools, this paper concentrates on unretouched blades from 4 South Scandinavian Mesolithic sites, seeking to establish how frequently and on what materials such pieces were used and whether they were selected for identifiable morphological reasons. The results are based on a study of 496 specimens, from various archaeological contexts. The materials processed ranged from soft to medium hard and most blades were used once only, as disposable tools. Their role relates more to 'manufacturing'than 'subsistence'activities. Blades seem to have been selected mainly according to their edge angles, with specific tasks in mind (a situation for which ethnographic parallels can be quoted), and they were evidently deliberately struck with a view to use rather than being chosen from random débitage. Various aspects of these conclusions are discussed.