Hi Claire,
I have traced a James Abbiss, age 25 and William Abbiss, age 40, both lodging with a widow Phillis Shelton, age 72 and four Shelton children aged from 5 to 14 at Charlton, Hitchin. No occupations are shown for the lodgers but they were both born in county.
The Ickleford PRs record the baptism of James s/o John and Ann Abbiss on 25th October 1812 whilst the BIVR records the marriage of John Abbiss and Ann Fox on 26 November 1808 at Ickleford.
Hope this helps.
Regards ... Peter