"Then we'll make a bargain!" exclaimed Sabella, joyfully. "That's the very name of Winn's uncle; and if I make believe you are my uncle, I shall have an Uncle Billy as well as he. I think that's better, too, because you know a girl couldn't have but one own papa, but she might have a hundred uncles if she wanted. So we'll make that a bargain, and I'll give you a kiss if you like, because Uncle Aleck says that's always the other part of a bargain."

With the kiss of the innocent child warm on his lips, William Gresham returned to the upper deck. His heart was very tender at that moment, and though he did not express any resolve in words, he knew that a black page of his life had just been closed, never to be reopened. He met Plater coming to find him, for he was wanted to aid in keeping the sharp lookout that the fog rendered necessary.

With all their senses alert and strained, the "river-traders" kept on for two hours without discovering a trace of the raft. Then they knew they must have passed it, and so headed the Whatnot up-stream again, hoping to meet it. Now they barely held their own, without making any progress, for they knew the raft would drift in the channel with the strongest current, and therefore that where the water ran swiftest they must await its coming.

Solon, fully occupied with his duties as engineer and with preparations for dinner, paid little heed to Sabella when she looked in at the galley door to inform him that her Uncle Billy said everything was all right.

"I specs so, honey, I specs so, an' of co'se hit's all right ef yo' Unc' Billy say so. Him a mighty knowin' young gen'l'man, dat ar Unc' Billy am, fo' shuah."

As the day advanced, there were occasional rifts in the fog, and in one of these Mr. Gilder, as we will still call him, caught a momentary glimpse of the raft. It was drifting at some distance to the right of them, and in a few moments would be again out of sight. His first impulse was to announce this discovery to his companions, and his second was to remain silent. He acted upon the second, and was almost doubtful if he had really seen the raft at all, so quickly did it again disappear. Suddenly there came a sound of blows, as though some one were chopping wood on board the raft.

There was an exulting shout from the pilot-house, the steering-wheel was put hard over, and the boat began to swing slowly at right angles to the current. She was headed in the direction of the raft, and Mr. Gilder knew that, owing to those ill-timed blows, it had been discovered. Yes. Now he could see it again. There it was, not a hundred yards away, and the Whatnot was headed so as to intercept it as it came down. What should he do? It would be foolish to struggle for possession of the wheel against the two desperate men in the pilot-house. He could stop the machinery though, or, better still, reverse it, and so give the raft a chance to drift past and again disappear in the mist. For Sabella's sake he would make the attempt.

He had already started for the lower deck, when his steps were arrested by a second shout from the pilot-house, and another sound that smote on his ear like a death-knell. It was the hoarse note of a deep-toned whistle apparently at his side. There was a jangling of bells, a wild yelling, the roar of escaping steam, and then the dim form of a great up-river packet loomed above the little craft on which he stood like some awful fog monster intent upon its destruction.

The man stood at the head of the steps leading down into the living-room, where Sabella, unconscious of the impending peril, was singing a quaint old hymn as she set the table for dinner. He had heard his mother sing that hymn when he was a boy at home. So long ago, and so far away. A second more and this sweet young life would be blotted out, and the little body, crushed beyond recognition, would be buried deep beneath the waters of the great river, while he would be safe on the lower deck of that steamboat. He could easily spring to it from the upper deck of the Whatnot, as he saw Plater and Grimshaw were about to do.

"I promise to see you safe with your friends again." That was what he had said, and it was to that child he had said it. In another instant the man had entered the living-room, seized Sabella in his powerful arms, and had gained the outer door on the side farthest from the steamboat.