"Why, I hardly know how to put it, sir," answered the second officer, a little confusedly. "Perhaps it's foolish to speak about it; and there may be nothing in it, after all."

"Out with it, Mr. Rogers," ordered the captain, all alert in an instant.

"Why, it's this way, sir," returned the second officer. "I don't like the way the men are acting. I never was sweet on the crew from the beginning, for the matter of that, not meaning any disrespect to Mr.

Ditty, who had the choosing of most of them. There's a few of them that are smart seamen, but most of them are rank swabs that don't know a marlinspike from a backstay. Seem more like a gang of river pirates than deep-sea sailors."

"I know that most of them are a poor lot," replied the captain. "But they've managed to work the ship down here, and I guess they can get her home again."

"But it isn't only that, sir," went on the other. "There's altogether too much whispering and getting into corners when the men are off duty to suit me. And they shut up like clams when I pa.s.s near 'em. And they're surly and impudent when I give 'em orders. I've had to lick a half dozen of 'em already."

"Well, you've got Mr. Ditty to help you out," said the captain.

"That's another queer thing, sir," continued the second officer, evidently reluctant to speak against his superior. "Mr. Ditty is usually quicker with his fists than he is with his tongue; but I never saw him like he is on this voyage. Seems like at times as though he took the men's part, sir."

"That's a hard saying, Mr. Rogers," said the captain.

"True enough, sir; but you told me to speak out. I had trouble with some of the men this very afternoon, sir, when I went over to the island. They found the water tasted of sulphur, and some of 'em started in saying that the devil wasn't very far off when you could taste brimstone so plain. Of course, sailors are superst.i.tious, and I wouldn't have thought anything of that, only it seemed as if the bad ones were just making that an excuse to get the others sore and discontented. They were growling and muttering amongst themselves all the time they were ash.o.r.e.

"I've got it off my chest now, sir, and maybe you'll think it's foolish, but I thought you ought to know. There's something going on that I can't understand, and it bothers me."

"You've done quite right to tell me what you have, Mr. Rogers," replied the captain, "and I'm obliged to you. I'll think it over. In the meantime, keep your eyes wide open and let me know at once if anything comes to light. By the way, did you ever find anybody who saw what happened to Mr. Parmalee?"

"Not a man among 'em will own to having seen anything. It was a dark night," replied Mr. Rogers, touching his cap and turning away.

Captain Hamilton sought out Tyke immediately and related to him what Rogers had said.

"How many men that you know you can depend on have you got in your crew?" asked Tyke quickly.

"Not more than a dozen that I'm sure of," admitted Captain Hamilton.

"That many've sailed with me on a number of voyages and they came home with me from Hong Kong. They are as good men as ever hauled on a sheet. But even some of them may have been affected by whatever it is that's brewing. It takes only a few rotten apples to spoil a barrel, you know."

"A dozen," mused Tyke reflectively. "Those, with you and Allen and me would make fifteen."

"Don't forget Rogers," put in Hamilton.

"Sixteen," corrected Tyke. "That leaves only eighteen, if Ditty's got 'em all. Counting himself, that's nineteen. Sixteen against nineteen.

Considering the kind of muts they are, we ought to lick the tar out of 'em."

"We could if it came to open fighting. But if they're up to mischief, they'll know what they're after and will have the advantage of striking the first blow.

"That is," he went on, "if there's anything in it at all. Perhaps we're just imagining they mean something serious, when after all it may be only a matter of sailors' grumbling. Rogers may have only uncovered a mare's nest."

"Perhaps," admitted Tyke. "All the same, I've never trusted that rascal, Ditty, from the minute I clapped eyes on him. An' since he lied so about Allen, I _know_ he's a scoundrel."

"I hope he did lie," said the captain doubtfully.

"_Hope!_" cried the old man hotly. "Don't you _know_? Look here, Rufe Hamilton, you an' me have been friends for going on thirty years, but we break friendship right here and now if you tell me you don't _know_ that Ditty lied!"

"There, there, Tyke," soothed the skipper, "have it your own way. But what we have on hand just now is how to get the better of Ditty and his gang."

Gradually Tyke's ruffled feathers were smoothed and he devoted himself to the matter in hand.

They talked late and long, but in the face of only vague conjectures, could reach no definite conclusion. One thing they did decide: It was so to manage matters as to leave Rogers in command of the schooner when the captain himself should be ash.o.r.e. Unless Ditty were actually deposed, and as yet there was no valid excuse for doing this, the only way they could carry out this plan was to see that Ditty was on sh.o.r.e at the same time that the treasure seekers were.

The next morning when the party was ready to start, Captain Hamilton spoke to Ditty.

"Mr. Ditty," he directed, "you will take ten of the men ash.o.r.e on leave this morning in the long-boat. I am going myself with the crew of the smaller boat. Mr. Rogers will remain in charge of the ship. If you find sweet water, send back for the casks."

Ditty started to make an objection.

"Beg pardon, sir, but I don't care for sh.o.r.e leave myself. Mr. Rogers can go in my place if he wants to, sir."

"You heard what I said, Mr. Ditty. Mr. Rogers went yesterday," said the captain curtly. "Have both boats lowered at once."

There was no help for it, and Ditty yielded a surly obedience.

"What time shall I bring the men back, sir?" he asked.

"When I give you the signal," replied the captain. "Perhaps not till late afternoon. Take your dinner grub with you."

The boats left the ship's side together, and in a few minutes both reached the beach. With instructions to Ditty to keep his men on the east end of the island, the captain's party entered the jungle.

They easily found the path they had trodden the day before, and were well on their way to the whale's hump when they were startled by a queer vibration of the earth. There was no sound accompanying it. On the contrary, everything seemed hushed in a deathlike stillness. The cries of birds and the humming of insects had stopped as though by magic. Nature seemed to be holding her breath.

Then came a second quivering stronger than the first--a shock which threw the four treasure hunters violently to the ground.

CHAPTER XXI

"IF I WAS SUPERSt.i.tIOUS-----"

"What is this?"

"An earthquake!"

"The island is sinking!"

"We'll have to get out of this!"

Such were some of the cries of the treasure hunters as the earth trembled beneath them.

For perhaps twenty seconds the sickening vibration continued. Then it stopped as suddenly as it had begun. The swaying trees finished their dizzy dance, and the rocks that had seemed to be bowing to each other like so many mummers resumed their impa.s.sive att.i.tudes. Their lawless frolic had ended!

Drew had caught Ruth by the arm as she went down, and thus had broken the violence of her fall. But all were jarred and shaken.

As the more agile of the quartet, the young man was first on his feet.

He tenderly a.s.sisted Ruth to rise, while the others scrambled up unaided.