James Herriot vet, Peter Wright worked with Alf Wight at Skeldale House; years later, his work was featured on a multi-season television series on Channel 5 (UK), "The Yorkshire Vet". In his books, Wight calls the town in which Herriot lives and works Darrowby, a composite of Thirsk, Richmond, Leyburn and Middleham. He also renamed Donald Sinclair and his brother Brian Sinclair as Siegfried and Tristan Farnon respectively, and used the name "Helen Alderson" for Joan Danbury. Contrary to popular belief, Wight's books are only partially autobiographical, with many of the stories being only loosely based on real events or people. Wight's
Donald Sinclair (veterinary surgeon) Donald Sinclair (veterinary surgeon) Donald Vaughan Sinclair (22 April 1911 – 28 June 1995) was a British veterinary surgeon (graduated from the Royal (Dick) School of Veterinary Studies, 1933) made famous as the eccentric character Siegfried Farnon in the semi-autobiographical books of James Herriot (Alf Wight), later adapted for film and television as "All Creatures Great and Small". In 1939, he bought an existing veterinary practice at 23 Kirkgate, Thirsk, Yorkshire, and in July 1940 hired Wight to run it while he (Sinclair) was undertaking his war service in the Royal Air Force. However, Sinclair had deliberately misrepresented himself as