The subject of the Manhattan's inquiry belonged to a controversy then going forward among the royal naval constructors and sea-captains. The reason why England's third and fourth rate cruisers carried only light guns, and many of them, was simply their frail timbering. Too heavy artillery might rack them dangerously. It would call for precisely the strength of frame provided by American shipyards for craft which might bump an ice-floe. Up-na-tan was still further informing himself concerning the skeleton of the _Noank_, when a shout from above summoned them both. "Guert," called down Captain Avery, "you and he come to the cabin. Now all's clear, you must learn something." On the deck all things were quiet. Not a sail was in sight that indicated a craft as large as their own. The schooner was spinning along, with all sails set and a fair wind in them. Everything about her, from deck to topmast, wore a clean, orderly, service look, that spoke volumes for the high character of her crew. She was all ready to do her best at any moment, and she was sure of being well handled. Perhaps a seaman would have critically remarked upon the fact that with such a wind she was not taking a course directly out into the Atlantic. The captain's cabin, well aft below deck, was a small affair. It seemed almost crowded when only half a dozen persons were in it. "Now, Guert," said Captain Avery, "if I don't make the chief understand, you must explain it to him. Talk Dutch, or any other lingo. He's the sharpest lookout there is on board, and he's a prime steersman. He must know what some things mean." "What things?" asked Guert. Two rugged old sailors who had entered the cabin with Sam Prentice, also looked on inquiringly, while the captain went to a locker and took out of it a leather case. "Guert," he said, "it's the first duty of the commander of a ship that's being taken by an enemy to put his private signal-book overboard. It's kept weighted all the while, so it will sink. Now, Luke Watts did his duty in that particular. His mate and his crew looked on and saw him do it. So did I. They saw him drown something like this." The case was open, now, and out of it was drawn what appeared to be several sheets of parchments, wired together, so that they might be rolled up like a pamphlet. "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.