Not to be confused with his son, John Heywood, 1832-1888, with whom he was in business.

LCCN unk84173779: His A 'whom wi' thi childer an' me, 18-- (hdg.: Heywood, John)

British Book Trade Index, via WWW, Feb. 9, 2021 (John Heywood; bookseller; newsagent; vendor; stationer; active in Manchester, England, before 1838 until about 1864; brother of Abel Heywood; father of John Heywood, Jr.; b. 1804; d. 1864)

DNB; Thieme-Becker; Bénézit; BLC (Heywood, John, bookseller; a firm name embracing both father & son listed in Boase); Blackburn, H. Randolph Caldecott, 1886; Davis, M.G. Randolph Caldecott, c1946; Caldecott, R. Randolph Caldecott, lord of the nursery, 1976.