[2][3][4] Castlekirk is located on a tiny island (0.18 ha or ½ acre) in the northwest corner of Lough Corrib, on the approach to Maum.

[citation needed] The Lord Justice Sir Edmond Butler, in 1225, caused Odo O'Flatherty to give up Castlekirk to Aedh Ua Conchobair, King of Connaught; for assurance of his fidelity.

[citation needed] Gráinne Ní Mháille in 1546, at the age of sixteen, married Dónal an-Chogaidh O'Flaherty who, because of his aggressive behaviour, got the nickname ‘the Cock’ and she was in turn was called ‘the Hen’.

In her work published in 1888, "Speranza" wrote the following: Strange lights are sometimes seen flitting through it, and on some particular midnight a crowd of boats gather round it, filled with men dressed in green with red sashes.

Then the people know that there has been a death somewhere in the region, and that the Sidhe have been stealing the young mortal children, and leaving some ill-favoured brat in the cradle in place of the true child.