One day he tried an experiment. He sunk a torpedo, and let loose a flat-boat, which came down with the current and struck the iron rod. The powder exploded and sent the flat high into the air. Thousands of Rebel soldiers stood on the bluffs and saw it. They hurrahed and swung their hats. Mr. Maury was so well pleased that the river was planted with them, above, in front, and below the town. He thought that Commodore Foote and all his gunboats would be blown out of the water if they attempted to descend the stream.

But the workmanship was rude. The parts were not put together with much skill. Mr. Maury showed that his science was not practical. He forgot that the river was constantly rising and falling, that sometimes the water would be so high the gunboats could glide over the iron rods with several feet between, he forgot that the powder would gather moisture and the locks become rusty.

It was discovered, after a while, that the torpedoes leaked, that the powder became damp, and changed to an inky mass, and that the hundreds of thousands of dollars which Mr. Maury had spent was all wasted. Then they who had supposed him to be a scientific man said he was a humbug.

The taking of Fort Donelson compelled the Rebels to evacuate Columbus,—the Gibraltar of the Mississippi, as they called it,—and all the work which had been done was of no benefit. Nashville was evacuated on the 27th of February. On the 4th of March Commodore Foote, having seen signs that the Rebels were leaving Columbus, went down the river, with six gunboats, accompanied by several transports, with troops, under General Sherman, to see about it. The Cincinnati, having been repaired, was the flag-ship. Commodore Foote requested me to accompany him, if I desired to.

“Perhaps we shall have hot work,” he said, as I stepped on board in the evening of the 3d.

“We shall move at four o’clock,” said Captain Stemble, commanding the ship, “and shall be at Columbus at daybreak.”

It was a new and strange experience, that first night on a gunboat, with some probability that at daybreak I might be under a hot fire from a hundred Rebel guns. By the dim light of the lamp I could see the great gun within six feet of me, and shining cutlasses and gleaming muskets. Looking out of the ward-room, I could see the men in their hammocks asleep, like orioles in their hanging nests. The sentinels paced the deck above, and all was silent but the sound of the great wheel of the steamer turning lazily in the stream, and the gurgling of the water around the bow.

“We are approaching Columbus,” said an officer. It was still some time to sunrise, but the men were all astir. Their hammocks were packed away. They were clearing the decks for action, running out the guns, bringing up shot and shell, tugging and pulling at the ropes. Going on deck, I could see in the dim light the outline of the bluff at Columbus. Far up stream were dark clouds of smoke from the other steamers.

Commodore Foote was on the upper deck, walking with crutches, still lame from the wound received at Donelson.

“I always feel an exhilaration of spirits before going into a fight. I don’t like to see men killed; but when I have a duty to perform for my country, like this, all of my energies are engaged,” said the Commodore.