Dumha Caechain — This place is now called Doonkeeghan. It was the name of an ancient fort on the site of which a castle was erected by one of the Barrett family. It is situated in the townland of Killygalligan, in the parish of Kilcommon, and barony of Erris, about eight miles and a half north-east of the little town of Belmullet. This fort stood on a projecting cliff, half a mile west of the coastguard station of Rinroe, in the most northern division of Erris, which was called Dumha Caochain from the sand banks which it contains in abundance, and Hy-Maccaochain from the tribe which inhabited it. The reader is here to understand that Dun Caechain, i. e. Keeghan's dun, or fort, was the true original name of the residence, and that Dumha Caochain was properly the name of the sandbanks in its vicinity.