Thank you everyone. It all helps, think I had confused myself going around in circles. This is all coming about because I am pretty certain I am missing some children from the tree, as there is a big gap, but can't find them. I know think that one of John and Mary Hearns daughter's married a Leman/Lemon. I am guessing at this stage, but as the child was Jane, that it was possibly Jane Hearn (1807) married James Lemon/Leman. Jane Leman/Lemon was then born, 1828, then she married Henry Pridham and it is their daughter that is Mary Ann. Now to work out if it was Jane Hearn to Mr. Lemon/Leman or if it is one of the mysterious children between the years of 1807 and 1815 that married Mr. Lemon/Leman. Another reason for me thinking Jane, is that she died in 1833 according to monumental inscriptions for Northam, and I can no longer find her in any census returns.