(I apologise if this appears twice, but I was just previewing it before posting and the whole thing disappeared).
My great aunts Margaret Devlin (11), Elizabeth Devlin (7) and Bridget Devlin (5) all appear on the 1901 census for Toomebridge County Antrim with their parents Patrick and Mary Devlin.
In 1911, their widowed mother is there with some of the younger children, but none of the three sisters named above are there. They are now only 21, 17, and 15, all of them alive and none yet married.
I have searched the Irish census for all counties and none of them appear as boarders or staying with relatives. I have done the same with Scotlands People in case they were on holiday in Glasgow and also with the English census. I can't find them anywhere. Does anyone have any ideas on this?