Dear Marianne - did you know that you can access the index to the 1841 and 1851 census free of charge at the Cambs Family History website? The address is www.cambridgeshirehistory.com There you will find all the Leachs you are looking for - Frances,14: James 35: Sarah 30: Robert 12 etc. The film number is HO107/86/10 folio 5B for Frances, 15B for James and Sarah, and 16A for the rest of the children. Liz