1. Research Laboratory for Archaeology and the History of Art; Dyson Perrins Building, South Parks Road Oxford OX1 3QJ UK
2. Centre for Archaeological and Forensic Analysis, DASSR/CDS; Cranfield University, Shrivenham; Swindon SN6 8LA UK
3. Department of Art History; University of Sussex, Falmer; Brighton BN1 9QN UK
4. Centre for Archaeological Sciences; Katholieke Universiteit Leuven; B-3001 Leuven Belgium