William Sumner & Richard Crossley
William Sumner son of Gilbert Sumner late of Hadley in the County of Essex farmer deceased, apprenticed to Thomas Chawner 5 October 1763 on payment of £25.00. Free 7 November 1770.
First mark entered as plateworker , in partnership with Richard Crossley 1 May 1775. Address:1 Clerkenwell Close.
Second mark (two sizes) 27 January 1776.
