Brian
Look at this one. Margaret Morrison nee Margaret Christian sister of John and Rebecca Christian, In the 1881 census she is shown at Ballavale Santon as housekeeper to her brother John. Her age is 22,place of birth Santon. Rebecca married Joseph Corrin and in 1881 Margaret Morrison is shown at his house, 1 Port A Bella Private House , Malew as sister in law, age 30 place of birth Santon. I realise there is a discrepancy in the ages but surely this is the same person at two addresses.