- [S100] A Special Corner of England Website, focusing on Castle Camps, Shudy Camps, Bartlow, Horseheath and West Wickham in Cambridgeshire, Marlene Williamson, (http://www.rd29.net/cc/;), citing Horseheath parish register - baptism of John Free, child of Robert and Phoebe, baker (Reliability: 2).
- [S302] Journal of the Cambridgeshire Family History Society, "Cambs Strays from Helions Bumpstead", Volume 3 No.4, November 1981, p.100 (Reliability: 2).
- [S70] Horseheath, Cambridgeshire - Transcript of Parish Register, 1553-1950, (Cambridgeshire Family History Society, CD-ROM, 2004;), burial of Phoebe Free 84, 23 May 1880 (Reliability: 2).
- [S103] 1861 Census Returns of England and Wales, General Register Office, (7 April 1861;), RG 9., RG 9/1030 f.57 p.18 (Reliability: 3).
Febey Free, Head, Widow, 65, Helyons Bumpsted
Sarah Free, Daug, Un, 32, Cambs Horseath
Susan Free, Daur, Un, 25, Cambs Horseath
Harriet Free, Daur, Un, 21, Cambs Horseath
Susan Free, Gran Daug, U, 17, Cambs Horseath