Note 350 — Chapter XI · MILITARY ARCHITECTURE IN THE LATER MIDDLE AGES: FORTIFIED TOWNS AND CASTLES
Reading edition
The turrets attached to some of the towers at Conway and Harlech are at the side, not in the centre. Such raised turrets were useful as look-out posts, and a watcher posted upon them could inform the defenders on the rampart-walk below of movements which they might not be able to follow for themselves.