It wouldn't surprise me Jenny if you actually have found Mary Tandy. Her age is right - she would be 18 at the time of the 1841 Census and therefore correctly listed as 15. A difficulty is the wrong name for the mother - Mary and not the expected Elizabeth. This may have been a silly mistake made by the Curate (Thomas Chapman). Thomas Chapman's records appear to be secondary records written up in
loose sheets or in rough notebooks and copying them into the register book at the end of the year
(I quote from the Dictionary of Genealogy.) Thomas Chapman's handwriting is extremely regular on the page, just as if written at one sitting. A "give away" is his mistake - he crosses out the entry at the top of the page because it is a duplicate of an item already written on the previous page. The item crossed out is dated July 7 - and the item that was previously written is halfway up the previous page and is dated May 5. This "William & Mary Tandy" only had the one child. If we change the parents names to "William & Elizabeth" then the baptismal date of 14 September 1822 fits quite nicely after the marriage date (of William & Elizabeth) of 20 November 1821.
Fortunately Mary Tandy is not my ancestor, so I have less interest in her. If she were my ancestor, I hope that I would have resisted the temptation. I can't find Mary in the 1851 Census. I can find a 14 September 1851 marriage of Mary Tandy & William Parkins in Radford Semele. In 1861 Mary Parkins aged 38 who was born in Radford Semele was living with her husband William in Coventry. So that will be the one baptised. But was her mother called Mary or was it Elizabeth? I cannot overcome my doubts, so I dismiss her with the feeble excuse that she is someone peripheral to my tree.
However Jenny, you did well.
Warwickshire Parish Records are Ancestry Copyright, from
www.ancestry.co.uk Census information is Crown Copyright, from
www.nationalarchives.gov.uk