Many months ago the Army of the Potomac stopped before Petersburg, driven out of its direct course to Richmond. It tried the Dutch Gap and the powder-ship, and shelled and shovelled till Sherman had cut five States in half, and only timid financiers, sutlers, and congressional excursionists paid the least attention to the armies on the James. We had fights without much purpose at our breastworks, and at Hatcher's Run, but the dashing achievements of Sheridan in the Shenandoah Valley overtopped all our dull infantry endeavors, and he shared with Sherman the entire applause of the country. No one knows but that behind these actors stood the invisible prompter, Grant; yet prompters, however assiduous, never divide applauses with the dramatis personæ; and therefore, when Sheridan, the other day, by one of those slashing adventures which hold us breathless, appeared on the Pamunkey and crossed the peninsula to City Point, even the armies of the Potomac and James were agitated. The personnel of the man, not less than his renown, affected people. A very Punch of soldiers, a sort of Rip Van Winkle in regimentals, it astonished folks, that with so jolly and grotesque a guise, he held within him energies like lightning, the bolts of which had splintered the fairest parts of the border. But nobody credited General Sheridan with higher genius than activity; we expected to hear of him scouring the Carolina boundary, with the usual destruction of railways and mills, and therefore said at once that Sheridan would cut the great Southside road. But in this last chapter Sheridan must take rank as one of the finest military men of our century. The battle of "Five Forks" was, perhaps, the most ingeniously conceived and skilfully executed that we have ever had on this continent. It matches in secretiveness and shrewdness the cleverest efforts of Napoleon, and shows also much of that soldier's broadness of intellect and capacity for great occasions.

Sheridan had scarcely time to change his horses' shoes before he was off, and after him much of our infantry also moved to the left. We passed our ancient breastworks at Hatcher's Run, and extended our lines southwestward till they touched Dinwiddie Court House, thirty miles from City Point. The Rebels fell back with but little skirmishing, until we faced northward and reached out toward their idolized Southside Railway; then they grew uneasy, and, as a hint of their opposition, fought us the sharp battle of Quaker Road on Thursday. Still, we reached farther and farther, marvelling to find that, with his depleted army, Lee always overmatched us at every point of attack; but on Friday we quitted our intrenchments on the Boydtown plank-road, and made a bold push for the White Oak road. This is one of the series of parallel public ways running east and west, south of the Southside, the Vaughan road being the first, the Boydtown plank-road the second, and the old Court-House road the third. It became evident to the Rebels that we had two direct objects in view: the severing of their railway, and the occupation of the "Five Forks." The latter is a magnificent strategic point. Five good roads meet in the edge of a dry, high, well-watered forest, three of them radiating to the railway, and their tributaries unlocking all the country. Farther south, their defences had been paltry, but they fortified this empty solitude as if it had been their capital. Upon its principal road, the "White Oak," aforenamed, they had a ditched breastwork with embrasures of logs and earth, reaching east and west three miles, and this was covered eastward and southeastward by rifle-pits, masked works, and felled timber; the bridges approaching it were broken; all the roads picketed, and a desperate resolve to hold to it averred. This point of "Five Forks" may be as much as eight miles from Dinwiddie Court House, four from the Southside road, and eighteen from Humphrey's, the nearest of our military railway stations. A crooked stream called Gravelly Run, which, with Hatcher's, forms Rowanty Creek, and goes off to feed the Chowan in North Carolina, rises near "Five Forks," and gives the name of Gravelly Run Church to a little Methodist meeting-house, built in the forest a mile distant. That meeting-house is a hospital to-night, running blood, and at "Five Forks" a victor's battle-flags are flying.

The Fifth Army Corps of General Warren, has had all of the flank fighting of the week to do. It lost five or six hundred men in its victory of Thursday, and on Friday rested along the Boydtown plank-road, at the house of one Butler, chiefly, which is about seven miles from Five Forks. On Friday morning, General Ayres took the advance with one of its three divisions, and marched three-quarters of a mile beyond the plank-road, through a woody country, following the road, but crossing the ubiquitous Gravelly Run, till he struck the enemy in strong force a mile and a half below White Oak road. They lay in the edge of a wood, with a thick curtain of timber in their front, a battery of field-pieces to the right, mounted in a bastioned earthwork, and on the left the woods drew near, encircling a little farm-land and negro-buildings. General Ayres's skirmish-line being fired upon, did not stand, but fell back upon his main column, which advanced at the order. Straightway the enemy charged headlong, while their battery opened a cross fire, and their skirmishers on our left, creeping down through the woods, picked us off in flank. They charged with a whole division, making their memorable yell, and soon doubled up Ayres's line of battle, so that it was forced in tolerable disorder back upon General Crawford, who commanded the next division. Crawford's men do not seem to have retrieved the character of their predecessors, but made a feint to go in, and, falling by dozens beneath the murderous fire, gave up the ground. Griffin's division, past which the fugitives ran, halted awhile before taking the doubtful way; the whole corps was now back to the Boydtown plank-road, and nothing had been done to anybody's credit particularly.

General Griffin rode up to General Chamberlain in this extremity. Chamberlain is a young and anxious officer, who resigned the professorship of modern languages in Bowdoin College to embrace a soldier's career. He had been wounded the day before, but was zealous to try death again.

"Chamberlain," said Griffin, "can't you save the honor of the Fifth corps?"

The young General formed his men at once,—they had tasted powder before,—the One Hundred and eighty-fifth New York and the One Hundred and ninety-eighth Pennsylvania. Down they went into the creek waist deep, up the slope and into the clearing, muskets to the left of them, muskets in front of them, cannon to the right of them; but their pace was swift, like their resolve; many of them were cut down, yet they kept ahead, and the Rebels, who seemed astonished at their own previous success, drew off and gave up the field. Almost two hours had elapsed between the loss and the recovery of the ground. The battle might be called Dabney's Farm, or more generally the fight of Gravelly Run. The brigades of Generals Bartlett and Gregory rendered material assistance in the pleasanter finale of the day. An order was soon after issued to hasten the burial of the dead and quit the spot, but Chamberlain petitioned for leave to charge the Rebel earthwork in the rear, and the enthusiasm of his brigade bore down General Warren's more prudent doubt. In brief, Griffin's division charged the fort, drove the Rebels out of it, and took position on the White Oak road, far east of Five Forks. While Griffin's division must be credited with this result, it may be said that their luck was due as much to the time as the manner of their appearance; the Rebel divisions of Pickett and Bushrod Johnston were, in the main, by the time Griffin came up, on their way westward to attack Sheridan's cavalry. Ayres and Crawford had charged as one to four, but the forces were quite equalized when Chamberlain pushed on. The corps probably lost twelve hundred men. In this action, the Rebels, for the first time for many weeks, exhibited all their traditional irresistibility and confidence. The merit of the affair, I am inclined to think, should be awarded to them; but a terrible retribution remained for them in the succeeding day's decrees.

The ill success of the earlier efforts of Sheridan, show conclusively the insufficiency of ever so good cavalry to resist well organized and resolute infantry. Concentrating at Dinwiddie Court House, he proceeded to scour so much of the country that he almost baffled conjecture as to where his quarters really were. As many thousand cavalry as constitute his powerful force seem magnified, thus mounted and ever moving here and there, to an incredible number. The Court House, where he remained fittingly for a couple of days, is a cross-road's patch, numbering about twelve scattered buildings, with a delightful prospect on every side of sterile and monotonous pines. This is, I believe, the largest village in the district, though Dinwiddie stands fourth in population among Virginia counties. At present there is almost as great a population underground as the ancient county carried on its census. Indeed, one is perplexed at every point to know whence the South draws its prodigious armies. Some English officers have been visiting Dinwiddie during the week, and one of them said, curtly: "Blast the country! it isn't worth such a row, you know. A very good place to be exiled, to be sure, but what can you ever make of it!"

This soulless Briton had never read any of the poems about the "boundless continent," and had no distinct conception of "size."

From Dinwiddie fields, Sheridan's men went galloping, by the aid of maps and cross-examination, into every by-road; but it was soon apparent that the Rebel infantry meant to give them a push. This came about on Friday, with a foretaste on Thursday.

Little Five Forks, is a cross-road not far from Dinwiddie Court House, in the direction of Petersburg. Big Five Forks, which, it must be borne in mind, gives name to the great battle of Saturday, is farther out by many miles, and does not lie within our lines. But, if the left of the army be at Dinwiddie, and the right at Petersburg, Little Five Forks will be first on the front line, though when Sheridan fought there, it was neutral ground, picketed but not possessed. Very early in the week, when the Rebels became aware of the extension of our lines, they added to the regular force which encamped upon our flank line at least a division of troops. These were directed to avoid an infantry fight, but to seek out the cavalry, and, by getting it at disadvantage, rid the region both of the harmfulness of Sheridan, and that prestige of his name, so terrifying to the Virginia house-wife. So long as Sheridan remained upon the far left, the Southside road was unsafe, and the rapidity with which his command could be transferred from point to point rendered it a formidable balance of power. The Rebels knew the country well, and the peculiar course of the highways gave them every advantage. The cavalry of Sheridan's army proper, is divided into two corps, commanded by Generals Devin and Custer; the cavalry of the Potomac is commanded by General Crook; Mackenzie has control of the cavalry of the James. On Friday, these were under separate orders, and the result was confusion. The infantry was beaten at Gravelly Run, and the cavalry met in flank and front by overwhelming numbers, executed some movements not laid down in the manual. The centre of the battle was Little Five Forks, though the Rebels struck us closer to Dinwiddie Court House, and drove us pell mell up the road into the woods, and out the old Court House road to Gravelly Run. We rallied several times, and charged them into the woods, but they lay concealed in copses, and could go where sabres were useless. The plan of this battle-field will show a series of irregular advances to puzzle anybody but a cavalry-man. The full division of Bushrod Johnston and General Pickett, were developed against us, with spare brigades from other corps. Our cavalry loss during the day was eight hundred in killed and wounded; but we pushed the Rebels so hard that they gave us the field, falling back toward Big Five Forks, and we intrenched immediately. Two thousand men comprise our losses of Friday in Warren's corps and Sheridan's command, including many valuable officers. We shall see how, under a single guidance, splendid results were next day obtained with half the sacrifice.