Thomas Annan, was the son of John and Agnes Annan. His second son, James Craig Annan, was a distinguished photographer.
He established studios in Glasgow from 1849, then in Hamilton and in Edinburgh. In Glasgow, he founded the company T. and R. Annan, photographers. He worked first with the calotype and later with the collodion process, as well as in photogravure.
http://www.edinphoto.org.uk (accessed 2004).