I have come into possession of a Book of Common Prayer published in 1772, with the following written on the flyleaf:-
Mary Atkins. John Quartermaine born 5 December 1800. Jane Quartrmaine born 5 December 800.
On 12 October 1795 Andrew Quartermaine married Mary Atkins in Aston Rowant.Their first child was a girl - she was christened Jane on 13 October 1799, but she did not survive and was buried on 23rd October. Their next child was also a girl, and was also christened Jane - that was on 7 December 1800.It is reasonable to assume that this is the Jane born two days earlier a/c to the BCP.There is no record of John being christened, so perhaps he died at birth. DAG