They were used as barracks, Casemated, and practically safe during the siege.
"The Thin Red Line; and Blue Blood"
Arthur Griffiths
One rides up to the gate, and as every one now has a matured opinion as to the taking of Casemated batteries and the inefficiency of granite bastions, one's first idea is how delightfully easy it would be to take Jerusalem.
"The Bertrams"
Anthony Trollope
According to Lord Nugent, in his Memorials of Hampden, this room is so contrived, by being surrounded by thick stone walls, and Casemated, that no sound from within can be heard.
"Strange Pages from Family Papers"
T. F. Thiselton Dyer