(en) Thomas Bayly Howell et Thomas Jones Howell, Cobbett's Complete Collection of State Trials and Proceedings for High Treason: And Other Crimes and Misdemeanor from the Earliest Period to the Present Time ... from the Ninth Year of the Reign of King Henry, the Second, A.D.1163, to ... [George IV, A.D.1820], R. Bagshaw, (lire en ligne)
Joseph Everett Early, The Life and Writings of Thomas Helwys, Mercer University Press, (ISBN9780881461466, lire en ligne), p. 40
The Purcell Family of America Genealogical Association Vol. 30-33, Purcell Family Genealogical Association, (lire en ligne), p. 101
John Nichols, Bibliotheca Topographica Britannica - Antiquities in Leicestershire; being the seventh volume of the Bibliotheca topographica Britannica · Volume 7, J. Nichols, (lire en ligne), p. 270
