Georges William Thornley (1857–1935) was son of Morgan Thornley, a Welsh immigrant to France, and became well known there as a lithographer and landscape painter, including for work based on his travels in Provence, Brittany, Normandy, the Pyrenees, the Alps and the Vosges. He first exhibited at the Paris Salon in 1878: in 1881 he won an honourable mention there and in 1888 a medal. Living at Osny from 1892, a journey down the River Vexin led him to Pontoise, where he met Monet and Pisarro, with whom he became friends at a time when both were seeking to publish work. Apart from his own painting, he became the former’s favoured lithographer, and also did many prints after work by the latter and other artists. Thornley died on 21st August 1935 in hospital at Pontoise and was buried in the town cemetery there.