6 Acknowledgements
The authors would like to thank Drs M. Doorenbosch, I. van der Jagt, A. Ramcharan, Drs E. Altena and Dr L. Meegens (Instituut Collectie Nederland) who all helped with the research. Furthermore we would like to thank Ir. J.H. Struik, Drs M. Lüschen and J. Kleine Deters for providing the X-ray images. Last but not least we would like to thank Dr J.H. Holwerda who made this research possible.
Quentin Bourgeois,
Faculty of Archaeology, Leiden University,
q.p.j.bourgeois@arch.leidenuniv.nl
.
Luc Amkreutz,
Rijksmuseum van Oudheden,
.
Raphaël Panhuysen,
University of Amsterdam,