Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 143,446 pages of information and 230,060 images on early companies, their products and the people who designed and built them.
Thomas Gemini (c.1510-1562) came to England from the Low Countries and became estabished as an engraver, printer and mathematical instrument maker in London. He may have been the first to establish a commercial instrument workshop in London. Four of his instruments are known to have survived in museums.