Self portrait by Joseph Mallord William Turner.
1798
This portrait was mentioned in the will of Hannah Danby to be given to Ruskin to be a part of the Turner Bequest.
Hannah was Turner’s housekeeper and 4G Grandmother, Sarah Danby’s (nee Goose) niece

New British 20 Pound Note featuring JMW Turner in the foreground of one of his well known paintings
“The Fighting Temeraire, tugged to her last berth to be broken up”
painted in 1838
Wikipedia: https://en.wikipedia.org/wiki/The_Fighting_Temeraire

The Fighting Temeraire Tugged to her Last Berth to be Broken Up (1838)
TConsidered to be JMW Turner’s best loved painting in Britain.