Stand by the Union by Oliver Optic

Christy had deposited his valise in a place where it was not likely to be seen unless a search was made for it. There was no one in the ward room to obstruct his advance to the captain's cabin. He had served as acting-commander of the vessel in a voyage from New York to the Gulf, and been the executive officer on board for a short term, and he was perfectly at home in every part of her. In the conspiracy on his last voyage in the Bronx, Pink Mulgrum had concealed himself under the berth in the captain's stateroom, where Dave, the cabin steward, had discovered him, though he might have remained there a month if his hiding-place had not been suspected.

Christy thought this would be an excellent retreat for him, not only because it promised him the greatest security, but because it would permit him to hear what passed between the pretended commander and others, especially Mr. Galvinne. He had been reasonably confident of returning to the gunboat when he went to the North as prize master, though not as her commander, and he had left his trunk on board.