John Wollaston ( - 1775 ) was a British painter. John Wollaston s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 1704.7 USD for Portrait of Lady Nellie Montrose in 2004 to 78000 USD for PORTRAIT OF CHARLES CARROLL OF DUDDINGTON AND MARY CAROLL in 2006 , based on the size and medium of the artwork.