Early career publishing satires, often by Colley. Later became the leading specialist in portrait prints with Thane. Published series of facsimiles of rare early British portraits for Grangerisers. Lugt refers to him as William Richardson Jr., suggesting that his father was also a printseller; it may be WR Senior who traded from 68, High Holborn in 1778. Note the prints by H. MacPhail, published from 68 High Holborn in 1784; this might be a pseudonym.

68, High Holborn 1778-82; 174, near Surrey Street, Strand 1783-90; 31, York House, Strand 1791-1814P; 2, Castle Street, Leicester Square 1795-97; 82, Lombard Street 1796; 31, Villiers Street, Strand 1800; 9, York Street, Covent Garden 1808. Trading: alone 1778-1805H; as William and Anthony Richardson 1785B; as J. Richardson 1803P-1809P; as William Richardson (junior) 1808-1814P. Ran Ancient and Modern Print Warehouse. Stock sold 23 Apr. 1814. BM Satires 1778-97; BM Book sales 1800, 1808; J. C. Smith 11, 226.