See also
Name:
James MERCER
Sex:
Male
Father:
John MERCER (1787-1856)
Mother:
Jane CATRELL (c. 1791-bef1851)
Birth:
c. 1851
Liverpool, Lancashire1
Probably an illegitimate grandchild. Maybe Sarah's as she is an annuant.
Residence:
1851 (age 0)
Address: Court 2
HO 107, 1851 Census England and Wales, (30 Mar 1851). The National Archives.