He greatly admired Walter's manner. The lad chattered over the beautiful gardens they had seen below without a hint in his voice or manner of the secret they had stumbled upon.

From time to time the crew shot glances of scowling suspicion at the little group, but they were evidently reassured by the boys' cheerfulness and apparent unconcern.

The Boy Chums in the Gulf of Mexico — Part 51

It was like sitting beside a powder mine with a lighted fuse in it, and both lads were greatly relieved when the long day dragged away to its close and the diving boat was headed back for the schooner.

The Boy Chums in the Gulf of Mexico — Part 51

They were met at the schooner's rail by the cook who seemed greatly excited and who greeted them with a torrent of rapidly spoken words.

The Boy Chums in the Gulf of Mexico — Part 51

Manuel listened with a look of sadness, real or assumed, on his face.

"He says," he interpreted swiftly, "that the wounded man went suddenly crazy this morning and flung himself into the sea."

THE chums looked at each other in silent comprehension. There was not a doubt in the mind of either that the sailor had been made away with during their absence from the ship. They recalled Manuel's talk with the cook before they left the schooner and the look of satisfaction in his face when he learned that they were all going on the diving boat. Even the captain was not slow to grasp the horrible truth.

"It's a terrible business, but don't let on that you suspect them," he whispered. "We've got to have a long talk and decide what it's best to do." To Manuel, he said, curtly, "I reckon, it's the fellow's own business if he wanted to drown himself, so you ain't got no cause to grieve. Better divide his things up amongst the crew."

Although they were eager for a talk alone, the four lounged carelessly about the deck, striving to appear unconcerned, until the Greek boy summoned them to supper below. They talked cheerfully until the cook had retired bearing the empty dishes with him. Then Charley arose and noiselessly closed the cabin windows and door so that their words would not reach the deck. Returning to his seat, he called the pale-faced little Greek lad to him, and, resting his hand on his head, said kindly,

"Ben, we are not going to repeat anything you say to us, and we want you to tell us just what has been troubling you the last few days."