A Henry Cox Mason, son of William Mason , Bermondsey Wall, Southwark, Surrey, watchmaker and goldsmith, was apprenticed to Thomas Cloak, Loriner's Company on 2nd May 1770. This may have been a younger brother as the area, Southwark, was where William Mason entered his only mark, as a bucklemaker at 146, High Street , Borough on 24th March 1778
The Daily Advertiser of 3rd February 1783 carried in the classified advertisement.
"To be sold by Auction, on the Premises, No 146 in the Borough High Street
All the Stock in Trade, Fixtures and a few lots of Household Turniture of Mr William MASON, Buckle-Maker , consisting of neat plated ,gilt , Metal and Black Buttons , Stone, Mocha and other Sleeve-Buttons, Gilt and Steel Watch-chains,Seals and Trinkets , Coat and Breast Buttons, Tea Trays and japanned Articles , Canes and Sticks, and a variety of othe Articles. The Fixtures of the Shop etc"
No mention of buckles !