Welcome to the Worldwide Greathead family my One-Name Study - Sources 30
- [S62] E-mails between Stephen Shawcross and Jan Cooper from 9 August 2004.
- [S72] E-mails between Ray Salmons and Jan Cooper from 24 August 2004.
- [S77] E-mails between Joan Whitfield and Jan Cooper from 1 October 2004.
- [S86] E-mails between Pauline Mounsey and Jan Cooper from 8 December 2004 Some of the information has been taken with permission from Pauline's family tree placed on Roots web.com.
- [S126] E-mails between John Hine and Jan Cooper from 12 October 2005.
- [S132] E-mails between Matthew Blackstock and Jan Cooper from 8 January 2006.
- [S163] E-mails between Cheryl Lammiman née Orton and Jan Cooper from 28 October 2006.
- [S261] Emails between Shane Walsh and Jan Cooper from 19 May 2009.
- [S280] E-mails between Halsted Trust and John Hanson from 21 November 2009.
- [S285] E-mails between Alan Hogan and Jan Cooper from 8 January 2010.
- [S286] E-mails between Ryan Tully and Jan Cooper from 4 January 2010.
- [S306] Information gleaned from book Guys Cliffe - Back to its roots by Bob Dixon, Recollections of a Country Mansion by Terry Roberts or from Friends of Guys Cliffe Chairman.
- [S311] Emails between Charles Wright and Jan Cooper from 9 November 2010.
- [S318] Emails between Patti Taylor and Jan Cooper from 28 January 2011.
- [S12037] Emails between Andrew M Bergman and Jan Cooper from 9 June 2006.
- [S18575] Emails between Charles Tullock and Jan Cooper from 20 April 2004.
- [S20283] Emails between Maurice Sellars and Jan Cooper from 16 March 2009.
- [S20313] Correspondence between Mary Szalay née Ferris and Jan Cooper from 21 January 2007.
- [S20645] E-mails between Richard Shadrack and Jan Cooper from 11 February 2008 title.
- [S20757] Letters between Barbara Viale née Little and Jan Cooper from 26 August 2008.
- [S21241] John H Gudgeon, from 26 August 2008.
- [S21266] Emails between Alan Montgomery and Jan Cooper from 28 August 2008.
- [S26878] E-mails between Jacki and Jan Cooper from 16 June 2011.
- [S27261] E-mails between Sarah Jerman and Jan Cooper from 16 August 2011 title.
- [S40036] Mrs P Hatfield (Eton College Archivist), Eton College Library, Eton College, Windsor, Berkshire SL4 6DB 01753 671221.