Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 149,267 pages of information and 234,239 images on early companies, their products and the people who designed and built them.
Captain George Eyston set several land speed records in his car Thunderbolt between 1937 and 1939, taking over from Malcolm Campbell's Bluebird but twice bettered by John Cobb. The rivalry was friendly though, and in later years Eyston, as competitions manager for Castrol, assisted with Cobb's ill-fated attempt on the water speed record in Crusader.
Thunderbolt was built in a factory previously occupied by A. Harper, Sons and Bean