- [S444] Will, Nathaniel Polhill, (written 20 November 1842 and proved at the Prerogative Court of Canterbury, London on 8 August 1843;), PROB 11/1984.
- [S192] FamilyHistoryOnline - Pay-per-view databases for England and Wales, Federation of Family History Societies, (www.familyhistoryonline.net;), burial of Mrs Mary Kell, age 56, 5 Mar 1820, St Michael, Lewes (Reliability: 2).
- [S337] Index to Marriage Licence Allegations, Faculty Office 1701-1850, (www.britishorigins.com;), marriage licence of Christopher Kell and Mary Polhill, 12 May 1789 (Reliability: 2).
- [S385] Sussex Marriage Index 1538-1837, Sussex Family History Group, (2004;), citing Sussex Notes & Queries vol.8 p.173, marriage of Christopher Kell, bach otp (lic), and Mary Polhill, sp. Lewes S.Anne, 16 May 1789, St Andrew Holborn, London, witnesses: Edmund Butcher, Jn. Clarke (Reliability: 3).