John Theodore Heins ( 1732 - 1771 ) was a British painter. John Theodore Heins s works have been auctioned off multiple times, with realized prices varying according to the size and medium of the artwork, for instance of 3660.89 USD for Portrait of Lucy, Lady Gage, daughter of William Knight, half-length, in an oyster satin dress and blue wrap, with a feathered h in 2003