Prince William Henry, 1765-1837, later William IV, King of the United Kingdom of Great Britain and Ireland and also King of Hanover from 1830 until his death. The engraving shows him as a midshipman in the Royal Navy which he joined at 13 years of age. He was present at the Battle of Cape Vincent in 1780 when he was 14 and the picture is thought to commemorate that event. The print by Francesco Bartolozzi is based on a work by artist Benjamin West and was published in 1782.