Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 143,388 pages of information and 230,040 images on early companies, their products and the people who designed and built them.
Campbells and Hunter of Dolphin Foundry, Leeds were makers of machine tools.
Was this the Dolphin Foundry once occupied by James Thompson?
1897 Various boiler-making machines featured in 'The Engineer', 20th August 1897 (for plate bending, boiler end finishing, and a combined circular planing/slotting/drilling machine)
1911 Heavy duty drilling machine for boiler shells
1911 Machines for drilling marine boilers. 
1917 Advert for gear cutting and hobbing
1927 Advert for gears of all types
1938 Acquired by R. W. Crabtree and Sons.