© National Portrait Gallery, London
Martha Ray; John Montagu, 4th Earl of Sandwich
after Unknown artists
line engraving, published 1769
4 1/4 in. x 6 7/8 in. (108 mm x 176 mm) plate size; 5 1/4 in. x 8 1/8 in. (133 mm x 207 mm) paper size
Given by Warburg Institute, 1958
NPG D16795
