The work was not always as easy as it sounds. Some years the Mississippi never rises out of its banks—and some years it does. When it did, it filled all the big timber in front of the levee with a rushing current, and Barney Layton had to use main strength as well as his wits getting out in his skiff to tend his light. Sometimes he would be carried by, and washed a mile down-stream before he could get out of the current and start home again; and with the river out of its banks, he was always rather glad when the post, too, was submerged, and the support for his light was either nailed on a tree in the front of the big timber or abandoned altogether for a week or two.

Big Timber Bend had been stable for several years. The swift current of the river sweeping by its front had apparently taken not a foot of soil from it. The light-post had been shifted hardly a rod in two seasons. The crossing seemed to hold its place.

But at last came a big water out of the Ohio, which found the river already full and the lower tributaries high. For weeks it stood over the banks and against the levees, and when at last it went down, it left the earthen banks saturated with water, so that they could with difficulty sustain their own weight without collapsing.

Then Silverplate Bend began to cave. As the pressure of the water on its front was withdrawn, the bank began to topple over and settle into the river in great slices, eating back farther and farther, changing the shape of the bend, and altering the set of the current over the crossing. The deflected swift water ate up into McAlpin’s Bar, and struck Big Timber Bend a hundred yards above the light; and one night the Rupert Lee, coming up, and steering by Barney’s beacon, as it turned where the crossing used to be, ran hard on a new bar at the head of Nodaway Towhead. She got off before morning, and lay up at the light till the crossing could be sounded, and Barney had a chat about it with pilot Ned Hinckley.

“Better get your light shifted,” said the pilot, banteringly. “If we’d been coming down and struck that bar with the current, the Rupert would have left her bones in it. What good’s a false beacon, youngster?”

“A false beacon?” Barney took that very much to heart. He told his mother about it, and she forthwith wrote to the lighthouse inspector; but the letter was forestalled the next day, when the tender Lily herself arrived with the inspector on board, sounded out a new channel, and moved Barney’s light up the bank to mark it.

“Now, Barney,” said the inspector, “you’ve got to be on watch. That bank in Silverplate is going to make trouble below. Big Timber Bend will begin caving before many days. It can’t stand this. The water is seventy feet deep right in front of this bank, and it must be cutting pretty steep now. The snag boat will be along pretty soon and cut the timber off quite away back, and then we’ll set the light farther inland. But till then you must watch, and if the bank where the light is starts to go, get the target and nail it to the front of that big gum-tree right behind it. If that goes, keep on working straight back till we get here. The crossing is moving up so you’ll be about right.”

Barney promised faithfully—and he kept his word. He was only a boy of fifteen, and it was a good deal of responsibility to have on his shoulders; but Barney was used to all kinds of responsibility, from taking care of his mother to hauling his cotton to the gin. He would keep this beacon true.

The inspector’s prophecy was promptly verified. Within a week Big Timber Bend was caving, and caving badly. When Barney came to put the light out one morning, he heard the roar of it—a roar that made him run, for it was more than the noise of earthen banks going in; it was the sound of trees crashing into the river.

He hurried through the woods and found his light still standing, but so close to the edge that it seemed saved by a miracle. The bank before it had given and slipped into the water, leaving not over a foot of earth before the post, and the ladder by which he usually mounted stuck out over empty air.