On the Main Line has posted a few pages from an 18th century book on Anglo-Jewry before the expulsion in 1290. It includes a picture of a bowl, found by a fisherman in a brook around 1700, with a Hebrew inscription (which seems - as far as I can tell - to dedicate it to one Joseph, son of Rabbi Yechiel from Poland / advisor to a Polish community). Jews at the time could not explain its usage; he suggests that it is an ancient version of a pushke, or tzedakah box.
Any other suggestions?