Are you quite sure the photo is labelled Cronk Ruagh?
There was a large Children's Home at Ramsey firstly in
a large house down beside the Mooragh Park & latterly
up above on the hillside in a house called Dalmeny, The
lady in charge there will have had a courtesy title " Sister
although when I visited in 1960 she was a teacher &
her successor too in the 60's, I believe It was run by the Methodist Church but now functions elsewhere in the town as a Day Nursery. I find it curious that there could
have been so many children at Cronk Ruagh at dates you
mention especially out of bed.