“Well,” replied the commander, in drawling tones, “I don’t expect too much. But if you could manage to keep the door mats clean it would be a great help.”

“Door mats—on a ship?” questioned Ned.

“Yes; of course,” replied the captain, with an assumption of dignity. “You see the salt spray gets all over the deck, and if it’s tramped into the cabins it makes the floors dirty. My steward is very particular about clean floors, and I thought that if you could help keep the mats clean, why it would make his work easier, and he wouldn’t grumble so much. However, if it’s too much trouble, why of course—”

“Oh, we’ll do it,” hastily agreed Fenn, fearing that the trip might be called off. He did not quite know how to take the captain’s remarks, for the commander had not the least suspicion of a smile on his face. After all, thought Fenn, it might be necessary to clean the door mats, and he resolved to do his share of it.

“Well, now that that’s settled,” went on the commander, as if a load had been taken from his mind, “we’ll go into further details.”

He then explained to the boys what they would need in the way of clothing and baggage, and he briefly described the trip. The duration of it was a little uncertain as he could not tell how long he would have to wait at Duluth, after unloading, before he could get a cargo to bring back.

“I guess I’ll get you home safe in time to begin the fall term of school,” he said, “and that ought to answer.”

“It will,” declared Ned. “It’s mighty fine of you to ask us.”

“Oh, I guess you’ll be worth your salt,” commented Captain Wiggs. “Besides attending to the door mats, I may expect you to look after the scuttle-butt, now and again.”

Fenn wanted to ask what the scuttle-butt was, but as the steward came in just then, to get some orders, the boys decided it was time to leave.