"Ugh!" said Up-na-tan. "Chief know 'em. Ship talk with lantern. Talk to other ship with flag. Captain got plenty lantern? Plenty flag? Tell Up-na-tan how."
A deep cupboard under the captain's bunk was at once thrown open, and its contents were interesting. Red, green, blue, yellow, white, large lanterns and small. Beside them lay a collection of sheafs of rockets, each of which carried a written parchment tab to tell its nature. Signal flags were there, also, in tightly tied-up rolls, and Up-na-tan loudly grunted his approval of them.
"First, now, for the book," said the captain. "Every man on board can be trusted to know signals. There isn't one traitor in the Noank, nor a fool, either. Sam and I must go on deck. You and the men and the redskin stay here and study those things. Git 'em all into your head, if you can. We may have a lot o' sharp dodgin' to do, this cruise."
Out he went, taking Sam with him, and then it at once appeared that Guert had become a remarkable kind of schoolmaster, trying to explain to others what he did not know himself. The two sailors were not altogether unlettered men, but lack of practice had left them slow at deciphering handwriting, and Guert seemed to have a knack of it. As for the Indian, he did not know one letter from another, but he could handle flags and lanterns as if they were hunting signs or the totems of clans and tribes. Signal after signal was picked out and its working practically illustrated in questions or answers.
"'Top!" exclaimed Up-na-tan, at last. "Head full! See more by and by." So said the sailors, and Guert himself felt as if he had been going through a hard time at a new school.
"But wasn't that a cute thing of Luke Watts!" he thought, as he came on deck. "I'd like to try some o' those signals on a British ship. I don't know how far we've run. The captain says our tightest squeeze isn't far ahead of us, now."
The schooner, oddly enough, was actually running within sight of Block Island. Some, at least, of her perils must be behind her. Perhaps more would have been if a sailing vessel could go straight ahead, in any direction, like a steamer. That, however, is one of several things that she cannot do. Many an hour of swift sailing, tacking back and forth, must often be extended in gaining only a few miles of her true course.
The crew of the Noank were not at all puzzled by the peculiar manner in which she was handled, and some of their faces betrayed anxiety.
"Guess ole Avery wish dark come," remarked Coco to his friends as they stood together at the foremast. "Lobster out yonder, somewhere."
It was only about the middle of the afternoon, and the captain's telescope was busy every few minutes.