This looks likel Francis in 1881 the older children may be from a former marriage of Martha?
16, Ct 4 H 50 Hospital Street, Birmingham
Frances Lamb Head 49 1832 Jeweller Birmingham, Warwickshire
Martha Lamb Wife 51 1830 - Fazeley, Warwickshire
Henry W Lamb Son 22 1859 Brass founder Birmingham, Warwickshire
Ann E Lamb Dau 20 1861 Gold polisher Birmingham, Warwickshire
Frances Lamb Son 13 1868 Scholar Birmingham, Warwickshire
Still no Louisa?
Colin