Caslon and Son
1792 William Caslon III, son of William Caslon II (1720-1778), late proprietor of the Caslon Foundry, purchased the foundry of the recently deceased Joseph Jackson in Salisbury Square and renamed it Caslon & Son, so that between 1792 and 1818 there were two distinct Caslon foundries in London
1807 Caslon & Son was passed to William Caslon IV
1819 William Caslon IV sold Caslon & Son to the new Sheffield foundry of Blake, Garnett and Co