Nothing in the history of the Rebellion has equalled in inhumanity and atrocity the horrid butchery at Fort Pillow, Ky., on the 13th of April, 1864. In no other school than slavery could human beings have been trained to such readiness for cruelties like these. Accustomed to brutality and bestiality all their lives, it was easy for them to perpetrate the atrocities which will startle the civilized foreign world, as they have awakened the indignation of our own people.

We have gleaned the facts of the fight from authentic sources, and they may be relied upon as truthful. The rebels, under Forrest, appeared, and drove in the pickets about sunrise on Tuesday morning. The garrison of the fort consisted of about two hundred of the Thirteenth Tennessee Volunteers, and four hundred negro artillery, all under command of Major Booth: the gunboat “No. 7” was also in the river. The rebels first attacked the outer forts, and, in several attempts to charge, were repulsed. They were constantly re-enforced, and extended their lines to the river on both sides of the fort. The garrison in the two outer forts was at length overpowered by superior numbers, and about noon evacuated them, and retired to the fort on the river. Here the fight was maintained with great obstinacy, and continued till about four, p.m. The approach to the fort from the rear is over a gentle declivity, cleared, and fully exposed to a raking fire from two sides of the fort. About thirty yards from the fort is a deep ravine, running all along the front, and so steep at the bottom as to be hidden from the fort, and not commanded by its guns. The rebels charged with great boldness dawn the declivity, and faced, without blanching, a murderous fire from the guns and small-arms of the fort, and crowded into the ravine; where they were sheltered from fire by the steep bank, which had been thus left by some unaccountable neglect or ignorance. Here the rebels organized for a final charge upon the fort, after sending a flag of truce with a demand for surrender, which was refused. The approach from the ravine was up through a deep, narrow gully, and the steep embankments of the fort. The last charge was made about four, p.m., by the whole rebel force, and was successful after a most desperate and gallant defence. The rebel army was estimated at from two thousand to four thousand, and succeeded by mere force of numbers. The gunboat had not been idle, but, guided by signals from the fort, poured upon the rebels a constant stream of shot and shell. She fired two hundred and sixty shells, and, as testified to by those who could see, with marvellous precision and with fatal effect. Major Booth, who was killed near the close of the fight, conducted the defence with great coolness, skill, and gallantry. His last signal to the boat was, “We are hard pressed and shall be overpowered.” He refused to surrender, however, and fought to the last. By the uniform and voluntary, testimony of the rebel officers, as well as the survivors of the fight, the negro-artillery regiments fought with the bravery and coolness of veterans, and served the guns with skill and precision. They did not falter nor flinch, until, at the last charge, when it was evident they would be overpowered, they broke, and fled toward the river: and here commenced the most barbarous and cruel outrages that ever the fiendishness of rebels has perpetrated during the war.

After the rebels were in undisputed possession of the fort, and the survivors had surrendered, they commenced the indiscriminate butchery of all the Federal soldiery. The colored soldiers threw down their guns, and raised their arms, in token of surrender; but not the least attention was paid to it. They continued to shoot down all they found. A number of them, finding no quarter was given, ran over the bluff to the river, and tried to conceal themselves under the bank and in the bushes, where they were pursued by the rebel savages, whom they implored to spare their lives. Their appeals were made in vain; and they were all shot down in cold blood, and, in full sight of the gunboat, chased and shot down like dogs. In passing up the bank of the river, fifty dead might be counted, strewed along. One had crawled into a hollow log, and was killed in it; another had got over the bank into the river, and had got on a board that run out into the water. He lay on it on his face, with his feet in the water. He lay there, when exposed, stark and stiff. Several had tried to hide in crevices made by the falling bank, and could not be seen without difficulty; but they were singled out, and killed. From the best information to be had, the white soldiers were, to a very considerable extent, treated in the same way. H. W. Harrison, one of the Thirteenth Tennessee on board, says, that, after the surrender, he was below the bluff, and one of the rebels presented a pistol to shoot him. He told him he had surrendered, and requested him not to fire. He spared him, and directed him to go up the bluff to the fort. Harrison asked him to go before him, or he would be shot by others; but he told him to go along. He started, and had not proceeded far before he met a rebel, who presented his pistol. Harrison begged him not to fire; but, paying no attention to his request, he fired, and shot him through the shoulder; and another shot him in the leg. He fell; and, while he lay unable to move, another came along, and was about to fire again, when Harrison told him he was badly wounded twice, and implored him not to fire. He asked Harrison if he had any money. He said he had a little money, and a watch. The rebel took from him his watch and ninety dollars in money, and left him. Harrison is, probably, fatally wounded. Several such cases have been related to me; and I think, to a great extent, the whites and negroes were indiscriminately murdered. The rebel Tennesseeans have about the same bitterness against Tennesseeans in the Federal army, as against the negroes. It was told by a rebel officer that Gen. Forrest shot one of his men, and cut another with his sabre, who were shooting down prisoners. It may be so; but he is responsible for the conduct of his men. Gen. Chalmers stated publicly, while on the Platte Valley, that, though he did not encourage or countenance his men in shooting down negro captives, yet it was right and justifiable.

The negro corporal, Jacob Wilson, who was picked up below Fort Pillow, had a narrow escape. He was down on the river-bank, and, seeing that no quarter was shown, stepped into the water so that he lay partly under it. A rebel coming along asked him what was the matter: he said he was badly wounded; and the rebel, after taking from his pocket all the money he had, left him. It happened to be near by a flat-boat tied to the bank, and about three o’clock in the morning. When all was quiet, Wilson crawled into it, and got three more wounded comrades also into it, and cut loose. The boat floated out into the channel, and was found ashore some miles below. The wounded negro soldiers aboard feigned themselves dead until Union soldiers came along.

The atrocities committed almost exceed belief; and, but for the fact that so many confirm the stories, we could not credit them. One man, already badly wounded, asked of a scoundrel who was firing at him, to spare his life. “No: damn you!” was the reply. “You fight with niggers!” and forthwith discharged two more balls into him. One negro was made to assist in digging a pit to bury the dead in, and was himself cast in among others, and buried. Five are known to have been buried alive: of these, two dug themselves out, and are now alive, and in the hospital. Daniel Tyler, of Company B, was shot three times, and struck on the head, knocking out his eye. After this, he was buried; but, not liking his quarters, dug out. He laughs over his adventures, and says he is one of the best “dug-outs” in the world.

Dr. Fitch says he saw twenty white soldiers paraded in line on the bank of the river; and, when in line, the rebels fired upon and killed all but one, who ran to the river, and hid under a log, and in that condition was fired at a number of times, and wounded. He says that Major Bradford also ran down to the river, and, after he told them that he had surrendered, more than fifty shots were fired at him. He then jumped into the river, and swam out a little ways, and whole volleys were fired at him there without hitting him. He returned to the shore, and meeting, as the doctor supposes, some officer, was protected; but he heard frequent threats from the rebels that they would kill him.

“Yesterday afternoon,” says “The Cairo News” of April 16, “we visited the United-States Hospital at Mound City, and had an interview with the wounded men from Fort Pillow.

“The Fort-Pillow wounded are doing much better than could be expected from the terrible nature of their wounds. But one, William Jones, had died, though Adjutant Bearing and Lieut. John H. Porter cannot possibly long survive. Of the whole number,—fifty-two,—all except two were cut or shot after they had surrendered! They all tell the same story of the rebel barbarities; and listening to a recital of the terrible scenes at the fort makes one’s blood run cold. They say they were able to keep the rebels at bay for several hours, notwithstanding the immense disparity of numbers; and, but for their treachery in creeping up under the walls of the fort while a truce was pending, would have held out until ‘The Olive Branch’ arrived with troops, with whose assistance they would have defeated Chalmers.

“So well were our men protected behind their works, that our loss was very trifling before the rebels scaled the walls, and obtained possession. As soon as they saw the Rebels inside the walls, the Unionists ceased firing, knowing that further resistance was useless; but the Rebels continued firing, crying out, ‘Shoot them, shoot them! Show them no quarter!’

“The Unionists, with one or two exceptions, had thrown down their arms in token of surrender, and therefore could offer no resistance. In vain they held up their hands, and begged their captors to spare their lives. But they were appealing to fiends; and the butchery continued until, out of near six hundred men who composed the garrison, but two hundred and thirty remained alive: and of this number, sixty-two were wounded, and nine died in a few hours after.