Wonder if this just may be Henry & Catherine wrongly Transcribed ?.
although I'm aware Henry's trade was was Iron Moulder, could he have changed jobs ?.
Back Oak Street
Henry Cambell ( Note Spelling ) Head age 29 b. 1852 Lancashire. Wool Carder.Hatter
Catherine Cambell Wife age 29 b. 1852 Lancashire
Joseph Cambell Son age 10 b. 1871 Lancashire
Sarah Ann Cambell Daughter age 8 b. 1873 Lancashire
James Cambell Son age 6 b. 1875 Lancashire
* Henry Cambell Son age 2 b. 1879 Cheshire. *
Mary Ann Cambell Daughter age 1 b. 1880 Cheshire.
Catherine Campbell Inmate Married age 40 b. 1851 Liverpool.
Hope this helps in some small way.