"Out in the woods, under guard." "They've got no prisoner, captain," said the major. "All they want is to see the inside of your vessel, and find out how many men and guns you have." "Well, they'll have to go away without accomplishing their object," said Frank. "I can't make any arrangements for an exchange," he shouted, "until I see your prisoner." The rebels lingered a moment, as if in consultation, and then mounted their horses and rode away. Every one who had heard the conversation laughed at the idea of attempting to deceive Captain Nelson with so shallow a trick, and the circumstance was soon forgotten by all except Frank, who knew that the guerrillas would not abandon their project simply because their first attempt had failed. Although he made no remark, he resolved to be doubly vigilant, and to be ready for any emergency. Two days afterward the dispatch-boat came alongside, on her way up the river, and the major took passage on her for Cairo. "I'm sorry to be obliged to leave you, captain," said he, as he stood ready to start, "for, if I am not very much mistaken, you'll have lively times here before long. The rebels are up to something, depend upon it. Don't let them catch you off your guard. Good luck to you!" It was lonesome in the cabin after the major left, for he was a good companion, and both Frank and Archie had become very much attached to him. The dispatch-boat had scarcely left the Boxer, when the officer of the deck reported a canoe approaching. It came from up the river, and, by the aid of the spy-glass, they discovered that it contained two men and was loaded with vegetables. It was customary for gun-boats to purchase such provisions as they needed from the people who lived along the banks, and in some places market-boats were received regularly every day. The men were paid, either in money, or, as they generally preferred, in coffee, flour, or sugar, from the paymaster's store-rooms; but this was the first time the Boxer had ever been visited, and this circumstance, taken in connection with the flag of truce, made Frank suspicious. "Shall we allow them to come alongside, sir?" asked the officer of the deck.