A correspondent of the "Chicago Times," who was with the fleet at the time of the bombardment, thus describes the manner of using these immense cannon: "The operation of firing the mortars, which was conducted when we were near by, is rather stunning. The charge is from fifteen to twenty-two pounds. The shell weighs two hundred and thirty pounds. For a familiar illustration, it is about the size of a large soup-plate. So your readers may imagine, when they sit down to dinner, the emotions they would experience if they happened to see a ball of iron of those dimensions coming toward them at the rate of a thousand miles a minute. The boat is moored alongside the shore, so as to withstand the shock firmly, and the men go ashore when the mortar is fired. A pull of the string does the work, and the whole vicinity is shaken with the concussion. The report is deafening, and the most enthusiastic person gets enough of it with two or three discharges. There is no sound from the shell at this point of observation, and no indication to mark the course it is taking; but in a few seconds the attentive observer with a good glass will see the cloud of smoke that follows its explosion, and then the report comes back with a dull boom. If it has done execution, the enemy may be seen carrying off their killed and wounded."
And so from mortar-boats and gunboats, the iron hail was poured upon the little island, but without effect. When Foote with his flotilla first opened fire, he thought that the Confederate works would be swept away in a day or two. His ordnance was the heaviest ever seen on the Mississippi, and in number his guns were enough to have battered down a mountain. But his days grew to weeks, and still the flag of the Confederacy floated above Island No. 10. The men on the mortar-boats were giving way under the tremendous shocks of the explosions. Many were rendered deaf for days at a time. The jar of the explosions brought to the surface of the river hundreds of old logs and roots that had lain rotting in the soft ooze of the bottom. When all the mortars were engaged, the surface of the river was covered with foam and bubbles; and men by the thousand went about with their ears stuffed with tow, to protect them against the sound. Yet, after weeks of such firing, Gen. Beauregard telegraphed to Richmond, that the Yankees had "thrown three thousand shells, and burned fifty tons of gunpowder," without injuring his batteries in the least.
The Confederates remained passive in their trenches. They had no guns that would carry far enough to reply to Foote's mortars, and they did not wish to waste powder. It was galling to stand fire without replying; but, fortunately for them, the fire was not very deadly, and but few were injured. When, however, a shell did fall within the works, it made work enough to repair damages, as by its explosion a hole as large as a small house would be torn in the ground. But for every one that fell within the batteries, twenty fell outside. Some strange freaks are recorded of the shells. One fell on a cannon, around which eight or ten men were lying. The gun-carriage was blown to pieces, but not a man was hurt. Another fell full on the head of a man who was walking about distributing rations, and not so much as a button from his uniform was ever found.
But while the navy was thus playing at bowls with great guns, the army had marched through the interior, captured New Madrid, and obtained a foothold below Island No. 10. Thus the Confederates were surrounded; and the very impassability of the land, that had been an advantage to them, now told against them, for it cut off all hope of re-enforcements. Gen. Pope's position was such that he could not get at the island, nor secure a commanding position, without aid from the navy. He begged Foote to try to run the batteries; but the commodore replied, that the risk was greater than the prospective gain, and continued his cannonade. Then a new idea was broached. By cutting a canal through the bayous, swamps, and woods of the peninsula, the lighter vessels could be taken by the fort without risk, and Foote would then dare the dangers of a dash by in the gunboats. Every one said that such a canal was impossible; but the men of the North were given to doing impossible things in those days, and while Foote's mortar-boats continued their thunder, fifteen hundred men were set to work cutting a way through the noisome swamps. A channel forty feet wide must be made. First gangs of men with axes and saws, working in three feet of water, went ahead, cutting down the rank vegetation. As fast as a little space was cleared, a small steamer went in, and with dredge and steam-capstan hauled out the obstructions. In some places the surveyed channel was so filled with drift-wood, fallen trees, and tangled roots, that the labor of a thousand men for a day seemed to make no impression. When the canal was pretty well blocked out, the levee was cut; and the rush of the waters from the great river undermined trees, and piled up new obstacles for the steamers to tow away. Amid the foulest vapors the men worked, and more than a thousand were sent to the hospital with chills and fever, and rheumatism. The most venomous snakes lurked in the dark recesses of the swamp; on cypress-stumps or floating logs the deadly water-moccason lay stretched out, ready to bite without warning. Wherever there was a bit of dry ground, the workers were sure to hear the rattle of the rattlesnake. Sometimes whole nests of these reptiles would be uncovered.
The work was continued day and night. When the failing daylight ceased to make its way through the thickly intwined branches of trees and climbing vines, great torches would be lighted, and by their fitful glare the soldiers and sailors worked on in the water and mud. The light glared from the furnaces of the steamers, lighting up the half-naked forms of the stokers. Now and then some dry vine or tree would catch a spark from a torch, and in an instant would be transformed into a pillar of fire. After eight days of work the canal was finished, and was found to be of sufficient depth for the passage of the transports. And now Commodore Foote saw that the time had come when he must attempt to run his gunboats past the forts, be the danger what it might.
On April 1, Foote ordered a reconnoissance of the batteries, and this order evoked one of the most daring deeds in the history of the war. The night was pitchy dark, and heavy clouds were driven across the sky by a strong, damp wind, that told of a coming storm. In five boats a party of fifty sailors and fifty soldiers put off from the fleet, prepared to go down and beard the Confederate lion in his den. Hardly had they started on their perilous expedition, when the rain began falling in sheets, and now and again flashes of lightning made the dark shores visible for an instant, then the black night hid every thing again from view. It was midnight, and the fierceness of the wind added to the terror of the moment. On the banks, the great forest-trees were bending and groaning before the blast, while the broad surface of the river was lashed into foaming billows. Under cover of the darkness the little band passed rapidly down the river; past the shore-batteries and past the Confederate picket-boats, they sped unseen. When they were within a few feet of the shore, a flash of lightning revealed them for just an instant to the sentries. Then all was black, save for the quick flashes of the sentries' guns as they gave the alarm and fell back. The Federals landed rapidly, and drove the confused Confederates from the battery. Then began the work of spiking the guns. Every fifth man carried a number of rat-tail files, which were to be driven into the vents of the cannon, and then broken off. While the raiders were engaged in this work, the Confederates rallied, and soon drove back the blue-jackets to their boats, with a slight loss in killed and captured. How many guns they had disabled, it is hard to say. In the excitement and glory of successful adventure, the reports were much exaggerated. Histories of that date depict the men as calmly spiking every gun, and then retiring deliberately. One writer claims that only one gun was spiked. However, testimony from Confederates on duty in the batteries goes to show that four guns were totally disabled. But the true value of the adventure to the Union forces was the dash and valor it disclosed, and the encouragement the people received from its success.
The next day after this successful exploit, a gunboat, the "Carondelet," was made ready to try the dash past the batteries of Island No. 10. Again the weather was favorable to the plans of the Federals, for the night was as dark and wild as the one before. The day had been clear, and the night opened with so bright a moon that for a time it was thought that the project would have to be abandoned; but toward ten o'clock a heavy thunder-storm came up, and soon the black sky, the wildly waving tree-tops, and the sheets of rain scudding across the river, gave promise of a suitable night.
All day the sailors on the "Carondelet" had been working busily, getting their vessel in trim for the trip. Heavy planks were laid along the deck, to ward off plunging shot. Chain cables were coiled about all weak points, cord-wood was piled around the boilers, and the pilot-house was wrapped round and about with heavy hawsers. On the side toward the battery was tied a large barge, piled high with cotton-bales. When the time for starting drew nigh, all lights were extinguished. The guns were run in, and the ports closed. The sailors, heavily armed, were sent to their stations. Muskets, revolvers, and sabres were in the racks. Down in the boiler-room the stokers were throwing coal upon the roaring fires; and in the engine-room the engineer stood with his hand on the throttle, waiting for the signal to get under way.
Towards eleven o'clock the time seemed propitious for starting. The storm was at its height, and the roll of the thunder would drown the beat of the steamer's paddles. The word was given; and the "Carondelet," with her two protecting barges, passed out of sight of the flotilla, and down towards the cannon of the enemy. For the first half-mile all went well. The vessel sped along silently and unseen. The men on the gun-deck, unable to see about, sat breathlessly, expecting that at any moment a cannon-ball might come crashing through the side into their midst. Suddenly from the towering smoke-stacks, burst out sheets of flame five feet high, caused by the burning soot inside, and lighting up the river all about. Quickly extinguished, they quickly broke out again; and now from the camp of the alarmed enemy came the roll of the drum, and the ringing notes of the bugle sounding the alarm. A gunboat was bearing down on the works, and the Confederates sprang to their guns with a will. The men on the "Carondelet" knew what to expect, and soon it came. Five signal rockets rushed up into the sky, and in an instant thereafter came the roar of a great gun from one of the batteries. Then all joined in, and the din became terrible. With volley after volley the Confederates hurled cannon-balls, shells, musket, and even pistol-bullets at the flying ship, that could only be seen an instant at a time by the fitful flashes of the lightning. On the "Carondelet" all was still as death. The men knew the deadly peril they were in, and realized how impossible it was for them to make any fight. In the black night, threading the crooked and ever-changing channel of the Mississippi River, it was impossible to go more than half-speed. In the bow men were stationed casting the lead, and calling out the soundings to the brave old Capt. Hoel, who stood on the upper deck unprotected from the storm of bullets, and repeated the soundings to Capt. Walker. So through the darkness, through the storm of shot and shell, the "Carondelet" kept on her way. Past the land-batteries, past the rows of cannon on the island, and past the formidable floating battery, she swept uninjured. Heavy and continuous as was the fire of the Confederates, it was mainly without aim. The hay-barge was hit three times, but not a scar was on the gunboat when she stopped before the water-front of New Madrid after twenty minutes' run through that dreadful fire.
And now the roar of the great guns had died away, and the men on the vessels of the flotilla up the river were all anxiety to know what had been the fate of their gallant comrades on the "Carondelet." All the time the battle raged, the decks of the ships at anchor were crowded with sailors looking eagerly down the river, and trying to make out by the blinding flashes of the cannon the dark form of a gunboat speeding by the hostile camp. Now all is silent; the roar of battle is over, the flash of gunpowder no more lights up the night. But what has become of the gallant men who braved that tempest of steel and iron? Are they floating down the troubled waters beneath the wreck of their vessel? It was a moment of suspense. After a few minutes' silence, there comes through the strangely quiet air the deep boom of a heavy gun. It had been agreed, that, if the "Carondelet" made the passage of the batteries safely, she should fire six heavy guns. The old tars on the decks say softly to themselves, "One." Then comes another, and a third, and still more, until suddenly a ringing cheer goes up from the flotilla, louder than the thunder itself. Men dance for joy; grizzled tars fall into each other's arms, sing, shout, cry. An answering salute goes booming back, rockets scud up into the clouds; and Commodore Foote, with a heart too full for talking, goes down into his cabin to be alone.