Thanks to all who replied yesterday. I now have an email address, and hope to get in touch. I do realize, as some of you pointed out, that he has made it clear that a) the photos are copyright free and b) he no longer maintains the website - both facts are stated unambiguously on his Contact page. It is just that it seemed polite to check before using all his hard work in such an intensive way. Thanks in particular to Jean-Pierre Houdin and Vincent Brown.