- [S31] A Genealogical and Heraldic Dictionary of the Peerage and Baronetage of the British Empire, Sir Bernard Burke, (London: Harrison, 1865, scanned original pages on www.ancestry.co.uk, 2004;), pp.1111-1112 (Reliability: 2).
- [S195] International Genealogical Index, The Church of Jesus Christ of Latter-Day Saints, (www.familysearch.org;), baptism of Florence, daughter of Edward Spencer Trevelyan and Catharine Ann (extracted) (Reliability: 2).
- [S349] National Probate Index, Probate Registry, https://probatesearch.service.gov.uk.
TREVELYAN Florence Trevelyan [struck out] Cacciola of Hallington Siculo Taormina Sicily Italy (wife of Salvatore Cacciola Trevelyan died 4 October 1907 Administration (with Will limited) London 30 April  to Joseph Atkinson Philipson solicitor attorney of the said Salvatore Cacciola Trevelyan. Effects £9961 3s. 4d.
- [S351] Bishop's transcripts of parish registers for Hartburn, Northumberland.
Edward Spencer Trevelyan of this Parish Bachelor and Catherine Anne Forster of this Parish Spinster were married in this Church by Banns this fifth Day of September in the Year One thousand eight hundred and thirty three By me Noel Thomas Ellison Rector of Huntspill & Nettlecomb Somerset Off. Minister
This Marriage was solemnized between us
Edward Spencr Trevelyan
Cathrine Anne Forster
In the Presence of
Maria Trevelyan Emma Wyndam Maria Jane Ellison
Jane Fenwick Helen C Trevelyan
John Forster AW Wyndam