"I think you will bear watching, Mr. b.u.mstead," murmured the pilot, as he went back to take the wheel. "I don't like your ways, and I'm going to keep my eye on you."

On his part the mate, after the visit of Nat and Mr. Weatherby, was in a somewhat anxious mood.

"I wish that boy had never come aboard," he mused. "I might have known he would make trouble. I must be more careful. If I had only been a few hours sooner my nephew would have had the place, and I would not have to worry. Never mind. I may be able to get him here yet, but I must first get Nat out of the way. He is too suspicious, and that sneaking pilot is helping him. Still, they know nothing of the case, nor how I got the wallet, and I'll not give it up without a fight. I must hide that pocketbook, though. Lucky I got the name off, or I'd be in a pretty pickle. If I had known he was Jim Morton's son I would almost have given up my place, rather than be on the same boat with him. But it's too late now."

He placed the wallet in a secret drawer in his safe, and then went on with his work, but it seemed that his attention was distracted, and several times he found himself staring out of his cabin window at nothing at all.

Nat tried to follow the pilot's advice, and give no more thought to the memento of his father which he had so unexpectedly discovered, but it was hard work.

For the next few days he was kept very busy. Captain Marshall found plenty of tasks for him, and, with running errands for the commander and the two mates, attending to what the purser had for him to do, and rendering occasional services for the pilot, the lad found himself continually occupied.

He was learning more about ships than he ever knew before, and on one or two occasions Mr. Weatherby took him into the pilot-house, and gave him preliminary instructions in the exacting calling of steering big vessels.

The freighter had stopped at several ports, taking on cargo at some, and discharging it at others. All this made work for Nat, but he liked it, for he was earning more than he had ever received before.

"Nat," said Mr. Dunn, one day, "I wish you would go down into the forward hold, and check over those bales we took on at the last port.

We've got to deliver them at the next stop, and I Want to be sure the shipping marks on them correspond to the marks on my list. I had to put them down in a hurry."

"All right," answered the boy. "Here are the manifest slips all written up, Mr. Dunn," and he handed the purser some blanks, filled in with figures.

"That's good. You are doing very well, Nat Keep at it and you'll get a better job soon."

Taking a lantern Nat went down into the forward hold, to examine some bales of goods, in accordance with the purser's instructions. The bales were heavy ones, but they had been stowed away in such a manner that the shipping marks were in sight.

As Nat left the purser's office a man, who had been standing near a window that opened into it, moved away. The man was the mate, Mr.

b.u.mstead, and as he saw Nat disappear below the deck he muttered:

"I think this is just the chance I want. We'll see how that whipper-snapper will like his job after to-day."

While Nat was checking off the bales, finding only one or two slight errors in the list the purser had given him, he heard a noise forward in the dark hold.

"Who's there?" he asked, for it was against the rules for any one to enter the cargo hold, unless authorized by the captain, mate or purser.

No answer was returned, and Nat was beginning to think the noise was made by rats, for there were very large ones in the ship. Then he heard a sound he knew could not have been made by a rodent. It was the sound of some one breathing heavily.

"Is any one here?" asked Nat. "I shall report this to the purser if you don't answer," he threatened.

Still no reply came to him.

"Perhaps it is one of the sailors who has crawled in here to get a sleep," Nat thought. "Maybe I'd better not say anything, for he might be punished."

He listened, but the sound, whatever it was, did not come again. The hold was quiet, save for the slight shifting of the cargo, as the vessel rocked to and fro under the action of the waves.

"There, all done but one bale," said Nat, half aloud, "and that one is turned wrong so I can't see the marks. Never mind, it's a top one, and I can easily shift it, as it's small."

He climbed up on a tier of the cargo, first setting his lantern down in a safe place, and then he proceeded to move the bale around.

Hardly had he touched it when the big package seemed to tumble outward toward him. He felt himself falling backward, and vainly threw out his hands to grasp some support. Farther and farther the bale toppled outward, until it struck against Nat, and knocked him from his feet.

He fell to the floor of the hold, in a little aisle between two tiers of freight, and the bale was on top of him.

[Ill.u.s.tration: "He fell to the floor of the hold"]

He heard a crash of gla.s.s, and knew that the lantern had been tipped over and broken. Then everything was dark, and he heard a strange ringing in his ears. Nat had been knocked unconscious alone down in the big hold, but, worse than this, a tiny tongue of fire, from the exposed lantern wick, was playing on the bales of inflammable stuff.

CHAPTER VIII

IN THE PILOT-HOUSE

About half an hour after Mr. Dunn had sent Nat into the hold the purser began to wonder what kept the boy. He knew his task should not have taken him more than ten minutes, for Nat was prompt with whatever he had to do.

"I hope he isn't going to do the way one boy did I used to have," said the purser to himself, "go down there and sleep. I think I'll take a look. Maybe he can't find those bales, though they were in plain sight."

As he started toward the hatchway, down which Nat had gone, he met Captain Marshall, who, as was his custom, was taking a stroll about the ship, to see that everything was all right. He never trusted entirely to his officers.

When he saw the purser, Mr. Marshall came to a sudden stop, and began to sniff the air suspiciously.

"Don't you smell smoke, Mr. Dunn?" he asked.

The purser took several deep breaths.

"I certainly do," he replied, "and it seems to come from this hatch. I sent Nat down there a while ago, to check off some bales."

"I hope he isn't smoking cigarettes down there," said the captain quickly. "If he is, I'll discharge him instantly."

"Nat doesn't smoke," replied Mr. Dunn. "But it's queer why he stays down there so long. I'm going to take a look."

"I'll go with you," decided the captain.

No sooner had they started to descend the hatchway than they both were made aware that the smell of smoke came from the hold, and that it was growing stronger.

"Fire! There's a fire in the cargo!" exclaimed Captain Marshall.

"Sound the alarm, Mr. Dunn, while I go below and make an investigation. If it's been caused by that boy----"

He did not finish, but hurried down into the hold, while Mr. Dunn sounded the alarm that called the crew to fire quarters.

Meanwhile, Nat had been lying unconscious under the bale for about ten minutes. The flame from the lantern, which, fortunately, had not exploded, was eating away at the side of the bale which was on top of him. Luckily the stuff in the bale was slow burning, and it smoldered a long time before breaking into a flame, in spite of the fact that the lantern was right against it. Considerable smoke was caused, however, though most of it was carried forward. Still, enough came up the hatchway to alarm the captain and purser.

It would have been very dark in the hold, but for the fact that now a tiny fire had burst out from the bale. By the gleam of this Captain Marshall saw what had happened. A bale had toppled from its place and smashed the lantern. But as yet he had no intimation that Nat was prostrate under the bale.

Meanwhile the smoke was growing thicker, and it was getting into Nat's nostrils. He was breathing lightly in his unconscious state, but the smoke made it harder to get his breath, and nature, working automatically, did the very best thing under the circ.u.mstances. Nat sneezed and coughed so violently, in an unconscious effort to get air, that his senses came back.

He could move only slightly, pinned down as he was, but he could smell the smoke, and he could see the flicker of fire.