Malcolm, Thanks for the reply. It is really good to find someone else who has an interest in Sparke, especially in Rattlesden. However, not sure if we have made a link yet? You refer to John (son of George)who married in 1846.I am sure this is not a direct relation of mine, but could be a brother of one. George Sparke and Mary (nee Stiff) had many children including Thomas (my ggGrandfather) and John.Do you know John's birth (I think it might be 1824) or anything else.
With regard to your gGrandmother Mary Jane, do you have any other info, a birth date? parents? This will help me try and tie her in to the info I have.