[1] Born in Abingdon-on-Thames in Berkshire (now Oxfordshire), Fuller went to London at age 14, as apprentice to a writing master.
[1] The London bank William Fuller & Son was founded "at the sign of the Artichoke", later 24 Lombard Street, around 1769.
Fuller, however, opposed the influence of Robert Sandeman, and campaigned against it, in a 1759 pamphlet Reflections on an Epistolary Correspondence between S.P.
[5] He was involved in the King's Head Society, and by eight annual major donations sustained the Congregational Fund Board.
His son Thomas had died a bachelor in 1796 and his youngest daughter Esther, wife of Joshua Ellis, in January 1800.