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The monument was inspected in 1983 and described as follows: 'A 19th century house [Knock House] and farm buildings occupy a flat area on the S bank of the River Brosna. No trace of earlier features’(SMR file). No castle is depicted at this location on any edition of the OS 6-inch maps. A castle was marked in this general region on the 17th century Down Survey parish map of Newtown in the barony of Moycashel (NLI, MS 723-4). The terrier of the Down Survey parish map states that ‘there are in this three castles viz., one at Knockycosker'(SMR File). The precise location of this castle has not been identified. In 1468 the Annals of the Four Masters recorded that ‘Owney Mageoghegan was killed by one cast of a javelin in the castle of Cnoc-Ui-Chosgraigh [Knockycosker]’ (O’Donovan 1856, 1055).
Compiled by: Caimin O'Brien
Date of upload: 13 March 2013
The monument record does not grant public access. Check the route and ask the landowner before entering private land.
The map shows the centre of the officially named townland area, not the monument. The government record does not identify the exact monument point.