Just as a matter of interest, the couple in the 1841 census had a John age 20, bapt. 24/5/1821 and daughters Rachel & Ruth bapt. 12/11/1826, but only Rachel on the 1841 census aged 15 and still another 7..
This might help or hinder.
Further info.
Parish Church of St Peter & St Paul Alconbury Weston.
Marriage.
24/6/1842 Murden Joseph ofa bac. Carpenter of Weston, s of John, Carpenter.
White Emma minor sp. dressmaker of Weston , d of James, farmer. Banns. Wit. Mary White, William Johnson.
Bapt.
24/6/1845 Murden Mary Ruth of Weston, d of Joseph & Emma, Carpenter.