Frank made no reply, but went on with his letter, and Archie leaned on one of the guns and gazed listlessly into the water.  At length they were interrupted by the boatswain’s whistle, blown three times in succession, long and loud.

“What’s the matter now, I wonder,” said Frank, as the sailors commenced running about the ship in all directions.

“I know,” answered Archie, as he saw Simpson dive into the cook’s galley and reappear bearing the mess-kettle, filled with steaming coffee, in one hand, and a large pan, containing the salt beef, in the other—­“dinner is ready.”

The cousins walked aft to their mess-chest, and found the berth-deck filled with men, who were sitting around the chests, brandishing their sheath-knives over plates fall of salt beef and “hard-tack.”

Coming directly from home, where they had been accustomed to luxurious living, our young sailors thought they could not relish this hard fare but, as they had eaten no breakfast, they were very hungry, and the food tasted much better than they had expected.

When dinner was ended, Simpson began to gather up the dishes belonging to his mess, preparatory in washing them.  Frank and Archie offered their assistance, and Simpson directed the former to take the mess-kettle and go up to the galley after some hot water.  When he was returning, he saw a man stealing around the deck, holding something behind him that looked very much like a bundle of rope, and keeping a close watch on every one he met.  Frank did not know what to make of this, and stepping up to the boatswain’s mate, he inquired: 

“What is that man doing with that bundle of rope behind him?”

“That ain’t a bundle of rope, you landlubber,” replied the mate; “that’s a swab.”

“Well, what is he doing with it?”

“The best way for you to learn would be for you to spill some of that water you have got in your kettle on the deck.”

Frank, without stopping to think, tipped up his kettle, and turned out some of the water; and the man, who had been watching his every movement, sprang toward him and threw down the swab, exclaiming, “I’ve caught you, my hearty; now you may log this bit of rope for awhile.”

“What do you mean?” inquired Frank, amid a roar of laughter from every sailor who had witnessed the performance.  “What does he mean?” repeated the mate; “why, he means that you have got to wipe up that water you have spilt on deck, and carry that swab until you can catch some one else doing the same thing.”

For the benefit of the uninitiated, we will make an explanation.  It often happens on shipboard, especially receiving-ships, that the men become very careless; and in carrying water, paint, or grease about the ship, frequently spill some of it on deck.  While this state of things continues, it is impossible to keep a ship clean, and, in order to break up this habit, the culprits are obliged to wipe up whatever they have spilled, and then carry a swab about the deck until they can detect some one else equally unfortunate.  This is not a pleasant task; for, as soon as this rule is put in force, the men become very careful, and the luckless offender is sometimes obliged to walk the decks the entire day before he can detect any one in the act of violating it.