While in the fort, his eyes were keenly employed to discover the position of the arms, and how the fort might most successfully be surprised. He discovered that there was a sentry standing near a guard-house, in which there were a quantity of arms heaped up in a corner, and that a considerable number of small arms were in the governor's hall. When he went on board, he ordered some hands on board a sloop lying at anchor, lest, hearing any bustle they should come to the aid of the castle; then desiring his men to avoid too much liquor, and to be ready when he should hoist the flag from the walls, to come to his assistance, he proceeded to the castle.
Having taken these precautions and formed these arrangements, he ordered every man who was to accompany him to arm himself with two pair of pistols, which he himself also did, concealed under their clothes. He then directed them to go into the guard-room, and fall into conversation, and immediately upon his firing a pistol out of the governor's window, to shut the men up, and secure the arms in the guard-room.
When Davis arrived, dinner not being ready, the governor proposed that they should pass the time in making a bowl of punch. Davis's boatswain attending him, had an opportunity of visiting all parts of the house, and observing their strength. He whispered his intelligence to his master, who being surrounded by his own friends, and seeing the governor unattended by any of his retinue, presented a pistol to the breast of the latter, informing him that he was a dead man, unless he should surrender the fort and all its riches. The governor, thus taken by surprise, was compelled to submit; for Davis took down all the pistols that hung in the hall, and loaded them. He then fired his pistol out of the window. His men flew like lions, presented their pistols to the soldiers, and while some carried out the arms, the rest secured the military, and shut them all up in the guard-house, placing a guard on the door. Then one of them struck the union flag on the top of the castle, which the men from the vessel perceiving, rushed to the combat, and in an instant were in possession of the castle, without tumult or bloodshed.
Davis then harrangued the soldiers, many of whom enlisted with him; and those who declined, he put on board the small ships, and to prevent the necessity of a guard, or the possibility of escape, carried off the sails, rigging and cables.