William Sumner, flatware maker, was apprenticed under Thomas Chawner. Worked in partnership with Richard Crossley 1775 – 1782 (mark WS/RC). His first mark was entered in 1782. His widow Mary and daughter Elizabeth were also registered as silver spoon makers.

Richard Crossley, London silversmith, not apprenticed. Already established as a spoonmaker, he became free by redemption in 1782. Livery 1791. 1st mark entered 1775 as spoonmaker in partnership with William Sumner. Further marks alone in 2nd 1776 (2 sizes), 1777, 1780, 1782, 1785, 1795 (2 sizes), 1802, 1804. 10th mark in partnership with George Smith as spoonmakers in 1807. 11th mark alone as plateworker 1812. Died 1815. Grimwade describes Crossley’s output of flatware as considerable.