Jackson records a late eighteenth century work by Hart, owned by a collector in Canterbury. The silhouette was painted in black on card and bronzed, although bronzing was not generally practised until after 1800. It is unknown whether Hart was an amateur or a professional. No more information on the artist has been located.
Source: McKechnie (Author of, British Silhouette Artists and their Work 1760-1860)
Hart, E. (McKechnie Section 2)