To quote the full title of the paper:
Ceramic Petrology and the Study of Anglo-Saxon and Later Medieval Ceramics by Alan Vince in Medieval Archaeology Volume XLIX 2005, pp219-245Well worth a look for those of the tile inclination, as for once 'ceramic' really does include ceramic building materials! And not just floor tiles either.
The author refers to the possibly early but unpublished roof tiles from Coppergate York. It was good of him to say that, as he's bringing welcome attention to the fact that important material is still not in the public domain. Unfortunately, I was only paid to do what amounted to a part-assessment on the Coppergate material (i.e all the recording, but no cigar - or should I say analysis!), so it's not even in prep :-( It's way too complex a sample for me to attempt to do off my own bat (i.e. for free), and I would also need significant input from the site side of things. Ah well, come my big lottery win ...
But there's a glimmer of hope: I'm currently working on a super (and again probably early) collection of curved and flanged tile. The site side of things will confirm this, and I won't get round to checking this out till March now. If the cbm from this site (Spurriergate) is not published in five years, I will put it on the web anyway.