Leaves from Robert Havell Sr.'s family bible; published in George F. Tudor Sherwood (1907), The Pedigree Register, vol 1. London: Society of Genealogists, p. 354; William Havell, buried 21 December 1832, St Lawrence, Reading
e.g. Prideaux (1909), p. 265; Williams (1916); ODNB (2004). Benezit Dictionary of Artists (2006) has Daniel and Robert as brothers. The Grove Dictionary of Art (1999/2006) hedges, writing that "According to their descendants, Robert was undeniably Daniel's son, though there is evidence to suggest that he may have been his uncle."