By December 1547, Ralph Cleisbye, Captain of the fort, had guns including a wheel-mounted demi-culverin, two brass sakers, a falcon, and another fixed demi-culverin. However, Beblowe Crag itself was not fortified until 1549 and Sir Richard Lee saw only a decayed platform and turf rampart there in 1565. Elizabeth I then had work carried out on the fort, strengthening it and providing gun platforms for the new developments in artillery technology. When James VI and I came to power in England, he combined the Scottish and English thrones, and the need for the castle declined. At that time the castle was still garrisoned from Berwick and protected the small Lindisfarne Harbour.