Born in Dublin, John Samuelson Templeton studied at the Dublin Society’s Drawing School, before moving to London. He became a portrait and landscape painter, and a lithographer of portraits and marine subjects after his own designs. He engraved several portraits in the 1830s and 1840s. His marine subjects included ‘The Crew of the Edward Landing from the Wreck on the North Wall, Dublin Bay’ (published 1825) and ‘Making for a Port, a Gale Coming On’ (1827). Templeton also made engravings for ‘The Guide to Oil Painting’, a series of books published by George Rowney & Co., suppliers of artists' materials.