Ella S. Armitage, The Early Norman Castles of the British Isles
“ There is no motte, but an oval area of 45 yards by 25 is ditched and banked; a modern imitation of a round tower stands within the enclosure. [B. T. S.] Carrickfergus, Antrim (Cal., i., 107) .—This was probably one of the castles built by John de Courcy, the conqueror of Ulster. The gatehouse and mural towers are late, but the keep may well be of De Courcy’s time, and furnishes an excellent instance of a castle on the keep-and-bailey plan, built by the Normans in stone from the beginning. ”
