The only known silhouettes attributed to T Colpoys are in the collection of Miss Betty Bird. These are two bust length profiles, one of a woman and the other of a small girl. Both show the same use of gold paint and Chinese white. However, the detail on the profile of the woman is very characteristic of the work of J.M. Rouse, and its attribution to Colpoys therefore remains in doubt.
Source: McKechnie (Author of, British Silhouette Artists and their Work 1760-1860)
Colpoys, Timothy (McKechnie Section 1)