Hello Matty

In 1881 I have a Peter MCDermott aged 22, born Halifax, occ Chemical Labourer. Living at 17 James Street, Halifax with:
Mary A MCDermott, wife, 25, Halifax, Cotton Rover
Mary A MCDermott, dau, 1m, Halifax
Clara Southwood, Sister, u, 16, Halifax, Worsted Winder
I was interested in Clara who I assume was Mary A's sister.
This would fit in with the Peter aged 13 on the 1871 Census listing above........