A three-quarter-length portrait to left. Although he appears to be wearing flag officer's full-dress uniform, 1748-67, the lacing is curiously idiosyncratic. He wears a white dress wig, his right hand is on his hip and his left is on the muzzle of a small cannon. On the left is a table with a book, chart and compass on it.

Relatively little is known about the sitter. He was made post-captain in 1713 and although employed for many years he is only notable for his command of the 'Norfolk', 80 guns, which took a prominent part in Vernon's attack on Cartagena in 1741. He was promoted onto the Superannuated List in 1747.

There are several mysteries surrounding this portrait. The inaccuracies in the uniform suggest that it may have been painted at a later date and though it was presented to Greenwich Hospital in 1834 by William IV, it is not clear why it was then in his possession. The painting is inscribed 'Adml Graves aet. 74 A.D. 1754' and the artist may have been from the circle of van de Mijn.