^"Handbook of British Chronology" by Fryde, E. B.;. Greenway, D. E.;Porter, S.; Roy, I.: Cambridge, CUP, 1996 ISBN 0-521-56350-X, 9780521563505.
^"A New History of Ireland" Moody, T. M.; Martin, F. X.; Byrne, F. J.; Cosgrove, F.:Oxford, Oxford University Press, 1976 ISBN 0-19-821745-5.
^ a b"Higgin, William (HGN813W)". A Cambridge Alumni Database. University of Cambridge.
^The Times, Wednesday, 17 November 1830; p. 3; Issue 14386; col F, Marriages.
^The Standard (London, England), Monday, 15 July 1867; p. 2; Issue 13397. (696 words). 19th Century British Library Newspapers: Part II.
^The Bury and Norwich Post, and Suffolk Herald (Bury Saint Edmunds, England), Tuesday, 16 July 1867; p. 7; Issue 4438. 19th Century British Library Newspapers: Part II.
^Yerburgh, Edmund Rochfort (1912). Some notes on our family history. London: Constable and Co. Ltd. pp. 197–198.