Three issues of the 'London Gazette': 9-12 October 1671; 27 February–3 March 1672; 9-13 October 1673.

Correspondence, accounts, bills, receipts, plans, press cuttings, leaflets, booklets, catalogues and notes, 1933-1975, accumulated by R. L. Gapper in relation to his dealings with traders, suppliers and professional craft organisations.