The castle-by-castle survey avoids crediting every Welsh fortress to one famous architect. Flint, Rhuddlan, Hawarden, Harlech, Caernarfon, Conwy, and Beaumaris form the core of the work attributed to James. Denbigh may reflect his influence because it lay within his operating area, while Aberystwyth and Builth receive more cautious treatment. Good deputies extended his reach, but even a powerful master of works could not supervise every site directly. The distinction separates broad architectural influence from documented personal control.
Chapter · 14:33-15:54
Which Ring of Iron castles James controlled
A castle-by-castle survey separates sites James clearly controlled from places where his involvement remains likely, limited, or uncertain.