A friend of mine collects, amongst other things, antique horn beakers. These beakers used to be made from discarded cow horns or even antler horns. The horns were soaked - sometimes for several months! - to make them pliable so that they could be shaped accordingly. He has a couple in his possession that he would like to discover more about. Actually, the maker rather than the beakers themselves. They appear to have been made in about 1820-1840 by a chap named J METCALF. This is stamped into the base of the beakers and an address of GT MARY BONE ST. That's it. Could this be another way of saying Great Marylebone Street? I have been rummaging in directories but have drawn a blank. The base stamps are shown above and this is what one of them looks like: So.... who was this mysterious J. METCALF? Over to you, super sleuths.