Ann Wilson b 14 Jul 1861 & her sister Janet b 22 Mary 1867 both appear on the 1881 census living with their father, their mother died in 1877. I can find no trace of either on the 1891 census, I've also check Yorkshire as an aunt moved there with her husband in the 1840s, also checked SP for marriages & deaths, without success. Their father, John died in January 1888 at the address of another daughter, although the Post Office Directory of 1887-88 shows him as a farmer at Cornhaddock on the farm he was born.
Ann & Janet seem to disappear around the time of the death of their father & I've checked outgoing ships from Greenock as well.
Anyone any ideas I can follow up?