When Corkran got to his portcullis, he thought he'd reached the reward of his labours.
Bid the varlets lower the draw-bridge and raise the portcullis.
Turning, they wished to flee into the castle and pull down the portcullis.
Edouard felt as it were a portcullis of ice come down between her and him.
This suggests colander, which, like portcullis, belongs to Lat.