Turret 41A (Caw Gap) (grid reference NY72556688) was located by exploratory excavation in 1912.[2] It had a doorway on the east side of the south wall.[2] In the later Roman period, the turret was deliberately demolished, and the Wall rebuilt across its site.[2] The remains of Turret 41A were consolidated in 1972-3 and are 20 centimetres high.[2]