This study digs beneath the cultural façade of pottery, delving deeper into the individual consciousness and choices behind the selection of the clays used to make them. The social significance of clay and its sourcing practices is rarely considered in ceramic studies, and is generally restricted to an assessment of technical properties. This subject is thus poorly theorised, ignoring the potential of that first choice and act in the social process of ceramic production. This thesis sets out a theoretical approach – raw-material spatialisation – and utilises a ceramic petrographic methodology designed to investigate social change through the changing composition of ceramic fabrics. The study focuses on the continuous pottery sequence spanning the 4th-11th century AD in Cornwall, a period of immense social, religious and political change, viewed in its regional and national context. The first synthesis of ceramic traditions in the South West for 50 years, this study highlights previously overlooked similarities in the phases of ceramic innovation and production between Cornwall and western Wessex and the role of Devon as an aceramic buffer zone. Previous studies have highlighted the selection and preference of gabbroic clays, unique to the Lizard Peninsula, used in the production of pottery in Cornwall since the start of Neolithic and which became a tradition that lasted roughly 5000 years. Interpretation has rarely moved beyond David Peacock’s original assumption of the technical superiority of this material. This study challenges and overturns that assumption, establishing that social choice was the motivating factor in its procurement. The repeated use of gabbroic clay created and maintained a shared social reality within the socialised landscape occupied by the past peoples of Cornwall. Gabbroic clay had a totemic meaning within society: its source became a node in the socialised landscape; and its repeated extraction and distribution maintained not only society but regional kinship networks and their identities. The shift away from the exploitation of this totemic material towards clays sourced locally to settlements around the 7th-8th century coincides with the growing influence of Christianity in Cornwall. One of the early monastic foundations was strategically placed at its socially significant gabbro source eventually eroding its totemic meaning. The end of the gabbroic tradition and the region’s resilient decentralised system of pottery production came with the Norman Conquest, when the creation of a new market centres, networks and systems of landownership forcibly integrated Cornwall into the wider national framework once more. This study conclusively demonstrates that the selection of a clay source should be interpreted as an indicator of social, and not merely technical or economic, choice. It also establishes that the use of a rigorous and systematic programme of scientific inquiry, combined with an informed theoretical perspective, can identify the evidence for social change behind the façade of the otherwise largely static pottery traditions of the 5th-11th centuries AD in most parts of the British Isles.

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No / Excavations in 1988 revealed a stratigraphic sequence extending from the later Roman period to the twelfth century. Of particular interest and importance is a collection of Viking-Age metalwork which, with other material, sheds light on settlement in Carlisle before the arrival of the Normans in 1092.

This thesis assesses the sixth-/early seventh-century socio-economic roots of the eighth-century transmarine system connecting England and the Continent through major coastal trading sites (emporia). Part 1 discusses socio-economic developments in the coastal areas of Kent, Sussex, Hampshire and the Isle of Wight, and the Pas-de-Calais, through a close investigation of fifth- to early seventh-century archaeological evidence. The inclusion of later written sources has been fundamental to recognise that the two shores of the Channel were connected in a more complex network than previously assumed, beyond the major emporia. These areas are then considered comparatively: after challenging substantivist approaches that assume an overwhelming importance of gift-exchange in sixth-century England, Part 2 stresses the role of transmarine traffic and exploitation of natural resources in the socio-economic development of coastal areas. The examination of sixth-century written sources has also proved rewarding to reconsider the sixth-century political relationships between Franks and Anglo-Saxons. The role of kings, churches and laymen in the later transmarine network (seventh/eighth centuries) is then discussed by including the Thames Valley, the estuaries of the rivers Seine and Loire, and the Rhine Delta, examined through the written sources. One crucial question is the role of political actors in the development of a cross-Channel system of exchange. In this regard, scholars have mainly focused on the period when this system was already in place, pointing to a pivotal role of kings and political institutions for its establishment, or to the later appropriation by elites of a coastal area already integrated in the maritime network, but detached from political power. This thesis argues that a close link existed between elites and coastal areas before the emporia; thus, although kings were not the driving stimulus for the establishment of trading sites, the transmarine traffic fostered the socio-economic development of the coastal communities.

This study is concerned with the compositional analysis of Roman and early post-Roman glass from both domestic assemblages and the remains derived from glass working and producing sites in Britain, using Inductively Coupled Plasma Spectrometry (ICPS). Samples analysed were from glassworking waste from Mancetter (midsecond century), Leicester (third century) and Worcester (first to third centuries), glass production debris, probably manufactured from the raw materials, in conjuncton with a domestic assemblage, from Coppergate (first to fourth centuries, or possibly later), and a domestic assemblage from Fishergate (spanning both the Roman and immediate post- Roman periods). All the glass analysed was shown to be of a typical and uniform soda-limesilica composition, except for a small number of vessel fragments from York which were higher in calcium. Any compositional differences between blue-green glasses typologically dated either to the Roman or Saxon periods, were found not to be consistent. Analysis of the colourless glass showed that the majority appeared to be actively decolorized using antimony, in conjunction with apparent differences in the compositions of the raw materials, when compared to glass of the same date in other colours. Compositional differences between melted waste from Mancetter, Leicester and Worcester, were apparent, but not to an extent which allowed characterization to be successful. Analysis of glassmelting pots from Coppergate showed some high temperature glassworking (and possibly glassmaking) could have occurred. Other debris, thought to be indicative of glassmaking was also analysed and compared to the composition of the Roman domestic assemblage.

This study is concerned with the compositional analysis of Roman and early post-Roman glass from both domestic assemblages and the remains derived from glass working and producing sites in Britain, using Inductively Coupled Plasma Spectrometry (ICPS). Samples analysed were from glassworking waste from Mancetter (midsecond century), Leicester (third century) and Worcester (first to third centuries), glass production debris, probably manufactured from the raw materials, in conjuncton with a domestic assemblage, from Coppergate (first to fourth centuries, or possibly later), and a domestic assemblage from Fishergate (spanning both the Roman and immediate post- Roman periods). All the glass analysed was shown to be of a typical and uniform soda-limesilica composition, except for a small number of vessel fragments from York which were higher in calcium. Any compositional differences between blue-green glasses typologically dated either to the Roman or Saxon periods, were found not to be consistent. Analysis of the colourless glass showed that the majority appeared to be actively decolorized using antimony, in conjunction with apparent differences In the compositions of the raw materials, when compared to glass of the same date in other 0 colours. Compositional differences between melted waste from Mancetter, Leicester and Worcester, were apparent, but not to an extent which allowed characterization to be successful. Analysis of glassmelting pots from Coppergate showed some high temperature glassworking (and possibly glassmaking) could have occurred. Other debris, thought to be indicative of glassmaking was also analysed and compared to the composition of the Roman domestic assemblage.