It was as early in the war as July, 1861, that the quarter-master-general advertised for bids for the construction of iron-clad gunboats for service on the Mississippi and tributary rivers. The contract was given to James B. Eads, an engineer, who during the war performed much valuable service for the United States Government, and who in later years has made himself a world-wide fame by the construction of the jetties at the mouth of the Mississippi River, by which the bar at the mouth of the great stream is swept away by the mighty rush of the pent-up waters. Mr. Eads was instructed to build seven iron-clad gunboats with all possible expedition. They were to be plated two and a half inches thick, and, though of six hundred tons burden, were not to draw more than six feet of water. They were to carry thirteen heavy guns each.

A River-Gunboat.

These river-gunboats, like the little "Monitor," had none of the grace and grandeur of the old style of sailing-frigate, in which Paul Jones fought so well for his country. The tapering masts of the mighty frigate, the spidery cordage by which the blue-jackets climbed to loosen the snowy sheets of canvas—these gave way in the gunboat to a single slender flagstaff for signalling, and two towering smoke-stacks anchored to the deck by heavy iron cables, and belching forth the black smoke from roaring fires of pitch-pine or soft coal. Instead of the gracefully curved black sides, with two rows of ports, from which peeped the muzzles of great cannon, the gunboat's sides above water sloped like the roof of a house, and huge iron shutters hid the cannon from view. Inside, all was dark and stuffy, making battle-lanterns necessary even in daylight fights. The broad white gun-deck, scrubbed to a gleaming white by hollystone and limejuice, on which the salt-water sailors gathered for their mess or drill, was replaced by a cramped room, with the roof hardly high enough to let the jolly tars skylark beneath without banging their skulls against some projecting beam. Truly it may be said, that, if the great civil war made naval architecture more powerful, it also robbed the war-vessels of all their beauty.

It is hard to appreciate now the immense difficulty experienced in getting those first seven river-gunboats built by the appointed time. The war had just begun, and a people accustomed to peace had not yet found out that those not actually at the seat of war could continue their usual course of life unmolested. Rolling-mills, machine-shops, founderies, saw-mills, and shipyards were all idle. Working-men were enlisting, or going to the Far West, away from the storm of war that was expected to sweep up the Mississippi Valley. The timber for the ships was still standing in the forests. The engines that were to drive the vessels against the enemy were yet to be built. Capt. Eads's contract called for the completion of the seven vessels in sixty-five days, and he went at his work with a will. His success showed that not all the great services done for a nation in time of war come from the army or navy. Within two weeks four thousand men were at work getting the gunboats ready. Some were in Michigan felling timber, some in the founderies and machine-shops of Pittsburg, and others in the shipyards at St. Louis, where the hulls of the vessels were on the stocks. Day and night, weekdays and Sundays, the work went on; and in forty-five days the first vessel was completed, and christened the "St. Louis." The others followed within the appointed time. Before the autumn of 1861, the river navy of the United States numbered nearly a score of vessels, while nearly forty mortar-boats were in process of construction. Of this flotilla, Capt. A. H. Foote, an able naval officer, was put in command, and directed to co-operate with the land forces in all movements.

The first service to which the gunboats were assigned was mainly reconnoitring expeditions before the front of the advancing Union armies. They were stationed at the junction of the Ohio and Mississippi Rivers; and the country about Cairo was occupied by a large body of Union troops under the command of Gen. Grant, then a young officer little known. The opening fight of the river campaign was little more than a skirmish; but it proved the superiority of the gunboats over a land-force for the purpose of opening the river. One bright day in September, the "Lexington" and "Conestoga" were ordered to proceed down the river eight or ten miles, and dislodge a Confederate battery that had taken a position on Lucas Point. The two vessels steamed cautiously down the stream, without encountering any resistance until within easy range of the battery, when the Confederates opened with sixteen cannon. The shot and shells fell all about the vessels; but neither was hit, showing that the Confederate gunners were not yet used to firing at a moving mark. But the fire of the gunboats was admirably directed; the shells falling among the Confederates, dismounting the guns, and driving the gunners from their pieces. It was too hot a spot for any man to hold; and a cavalry corps quickly attached their horses to the guns, and drew them down the river to the shelter of the Confederate works at Columbus. Then the defeated party sent up the gunboat "Yankee" to attack the two victors, but this vessel was quickly disposed of. She opened fire at long range, but without success. The first shot from the "Conestoga" struck the water a few feet from the "Yankee," and, ricochetting, plunged into her hull. The discomfited vessel immediately put about, and started down stream, followed by a heavy fire from the two Northern ships. Just as she was passing out of range, an eight-inch shell from the "Lexington" struck her starboard wheel-house, and shattered the paddle-wheel, totally disabling the vessel, so that she drifted sidelong to her anchorage like a wounded duck.

On the return of the Northern vessels up the river, they first encountered the form of warfare that proved the most perilous for the sailors of the river navy. Confederate sharp-shooters lined the banks, perched in the trees, or hidden in the long, marshy grass; and any unwary tar who showed his head above the bulwarks was made a target for several long rifles in the hands of practised shots.

The next active service performed by the gunboats was at the battle of Belmont, directly opposite the Confederate batteries at Columbus. The Union troops, landing in force, had driven the Confederates from their camp, and were engaged in securing the spoils, when the gunners at Columbus, seeing that the camp was in the hands of the enemy, turned their heavy guns on it, and soon drove out the Yankees. The Confederates had rallied in the woods, and now came pouring out, in the hope of cutting off the Union retreat to the boats. On all sides the dark gray columns could be seen marching out of the woods, and pouring down upon the retreating army of the North. Batteries were wheeling into position, and staff-officers in travelling carriages were dashing to and fro carrying orders. It seemed a black day for the three or four thousand Unionists who were making for their transports with all possible speed. But now was the time for the gunboats to take a hand in the fight. Three of them dropped into position, and began a deadly fire upon the Confederate line. The huge shells ploughed their way through whole platoons of men. Bursting, they would mow down soldiers like saplings before a cyclone. One shell exploded directly beneath an officer's carriage, and threw horses, carriage, and men high in the air. The Confederates hastened to get their field-batteries into position, and replied to the deadly fire from the ships, but to no avail. Their light artillery was of no effect upon the plated sides of the gunboats, and they saw their cannon dismounted or shattered by the solid shot from the big guns of the iron-clads. They fought bravely, but the conflict was unequal. It was sheer madness for any body of men, with muskets and light artillery, to stand against the fire of the gunboats. The gunboats saved the day. The retreat of the Union army was unchecked; and, covered by the war-vessels, the transports returned safely to Cairo.

On the Tennessee River, near the northern boundary of Tennessee, the Confederates had thrown up certain earthworks to which they gave the name of Fort Henry. This, with Fort Donelson, situated near by, formed the principal Confederate strongholds in Tennessee. Gen. Grant determined to strike a heavy blow by capturing these two forts; and Commodore Foote, with his seven gunboats, was ordered to co-operate with the land-forces in the expedition. They started from Cairo on Feb. 2, 1862. When a few miles below the fort, the troops were landed and ordered to proceed up the back country, and attack the fort in the rear, while Foote should engage it from the river with his gunboats. While the troops were being landed, Gen. Grant boarded the "Essex," and went up the river to get a view of the fort they were about to attack. Had it been completed in accordance with the plans of the engineers, it would have been most formidable. Time, however, had been short, and the earthworks were far from being completed. There were many points on the river or on the opposite bank, from which a well-directed artillery fire would make them untenable. The Confederate commander, Gen. Tilghman, fully appreciated this fact, and, at the approach of the gunboats, had sent four-fifths of his garrison across the country to Fort Donelson, being determined to sacrifice as few men as possible in the defence of so untenable a position. While Grant and Foote were examining the works through their field-glasses, the sullen boom of a great gun came over the waters, and a heavy rifled shot crashed through the stateroom of Capt. Porter on the "Essex." The two commanders concluded that the Confederate gunners, though new to war, understood something of artillery practice; and the "Essex" was accordingly taken down the river, out of range.