On the Blockade by Oliver Optic

One bell sounded on the gong in the engine room, and the Bronx began to go ahead. Christy felt that the most tremendous hour of his lifetime had come, and he struggled to keep down the excitement which agitated him; and he succeeded so far that he appeared to be the coolest man on board of the ship. When Flint came in the vicinity of the bridge, he called to him to join him. The men were procuring their revolvers and cutlasses, and he had a moment to spare. The captain instructed him to conceal the boarders so that they could not be seen on board the steamer in the fog when the Bronx came up with her. He added some other details to his orders.

"If possible, I wish you to keep as near Lillyworth as you can," continued Christy, "for I shall not have the opportunity to watch him. This war cannot be conducted on peace principles, and if that man attempts to defeat my orders in any manner, don't hesitate to put a ball from your revolver through his heart. Use reasonable care, Mr. Flint, but bear in mind that I am not to be defeated in the capture of that steamer, if she proves to be what I suppose she is, by the treachery of one who accepted a position as an officer on board of the Bronx. " The commander was firm and decided in his manner, and Flint had served with him enough to know that he meant what he said.