Hi Trish
On marriage cert for William(b 1818) he is a blacksmith and his father, William Eyre, is deceased.
According to a LDS member's submission, William lived in 6 Church St., Sandford, Oxon on 6th June 1841 and was a labourer, and in 1844 was a blacksmith.
The mother of children for William and Martha would have to be Martha. The Sawyer baptisms in Freebmd for Abingdon are promising as Sandford is in this registration district, as is Bayworth.
Cheers
Colin