Brig

In the act of offering up his last prayer ere he made up his mind to float and be eaten, he saw a man look over the quarter of the brig : he raised both his hands ; he jumped himself up in the water, and, by the singularity of his motions fortunately attracted notice.

Throw him in the brig.

Tom is in the brig for disobeying a direct order from his commanding officer.

Now do thy speedy utmost, Meg, / And win the key-stane of the brig;