StillStill, M.C.W. Roman Lead Sealings. (University of London, 1995).PhD dissertation, University College London, Institute of Archaeology. This thesis is based on a catalogue of c.1800 records, covering over 2000 examples of Roman lead sealings, many previously unpublished. The catalogue is provided with indices of inscriptions and of anepigraphic designs, and subsidiary indices of places, military units, private individuals and emperors mentioned on the sealings. The main part of the thesis commences with a history of the use of lead sealings outside of the Roman period, which is followed by a new typology (the first since c.1900) which puts special emphasis on the use of form as a guide to dating. The next group of chapters examine the evidence for use of the different categories of sealings, i.e. Imperial, Official, Taxation, Provincial, Civic, Military and Miscellaneous. This includes evidence from impressions, form, texture of reverse, association with findspot and any literary references which may help. The next chapter compares distances travelled by similar sealings and looks at the widespread distribution of identical sealings of which the origin is unknown. The first statistical chapter covers imperial sealings. These can be assigned to certain periods and can thus be subjected to the type of analysis usually reserved for coins. The second statistical chapter looks at the division of categories of sealings within each province. The sealings in each category within each province are calculated as percentages of the provincial total and are then compared with an adjusted percentage for that category in the whole of the empire. The final chapter is based on the iconography found in the impressions on the sealings. This includes the styles of imperial portraits, deities, animals, inanimate objects, designs which may come from outside of the empire, similar impressions on other items, epigraphic styles and possible examples of matrices. Available online: http://discovery.ucl.ac.uk/1317870/