SUDLEY SPRINGS FORD, LOOKING NORTH. From a sketch made in 1884. RUINS OF THE STONE BRIDGE. Looking along the Warrenton Turnpike toward the battle-field. assume the offensive in front.” “The situation and circumstances specially favored the signal success of such an operation,” says Beauregard. An attack hy two armies moving from opposite points upon an enemy, with the time of attack for one depending upon the sound of the other’s cannon, is hazardous even with well-disciplined and well-seasoned troops, and is next to fatal with raw levies. Johnston chose the wiser course of moving by rail to Manassas, thus preserving the benefit of “interior lines,” which, Beauregard says, was the “sole military advantage at the moment that the Confederates possessed.” The campaign which General Scott required McDowell to make was undertaken with the understanding that Johnston should be prevented from joining Beauregard. With no lack of confidence in himself, McDowell was dominated by the feeling of subordination and deference to General Scott which at that time pervaded the whole army, and General Scott, who controlled both McDowell and Patterson, assured McDowell that Johnston should not join Beauregard without having “Patterson on his heels.” Yet Johnston’s army, nearly nine thousand strong, joined Beauregard, Bee’s brigade and Johnston in person arriving on the morning of the 20th, the remainder about noon on the 21st. Although the enforced delay at Centreville enabled McDowell to provision his troops and gain information upon which to base an excellent plan of attack, it proved fatal by affording time for a junction of the opposing forces. On the 21st of July General Scott addressed a despatch to McDowell, saying: “It is known that a strong reinforcement left Winchester on the afternoon of the 18th, which gineers of the enemy’s position and the intervening country. His men, not soldiers, but civilians in uniform, unused to marching, hot, weary, and footsore, dropped down as they had halte'd and bivouacked on the roads about Centreville. Notwithstanding Beauregard’s elation over the affair at Blackburn’s Ford on the 18th, he permitted the 19th and 20th to pass without a movement to follow up the advantage he had gained. During these two days, McDowell carefully examined the Confederate position, and made his plan to manceuver the enemy out of it. Beauregard ordered no aggressive movement until the 21st, and then, as appears from his own statement, through miscarriage of orders and lack of apprehension on the part of subordinates, the effort was a complete fiasco, with the comical result of frightening his own troops, who, late in the afternoon, mistook the return of one of their brigades for an attack by McDowell’s left, and the serious result of interfering with the pursuit after he had gained the battle of the 21st. But Beauregard, though not aggressive on the 19th and 20th, was not idle within his own lines. The Confederate President had authorized Johnston, Beauregard’s senior, to use his discretion in moving to the support of Manassas, and Beauregard, urging Johnston to do so, sent railway transportation for the Shenandoah forces. But, as he states, “ he at the same time submitted the alternative proposition to Johnston that, having passed the Blue Bidge, he should assemble his forces, press forward by way of Aldie, northwest of Manassas, and fall upon McDowell’s right rear,” while he, Beauregard, “prepared for the operation at the first sound of the conflict, should strenuously himself “that the enemy was in force,” and ascertained “the position of his batteries,” he withdrew. This unauthorized reconnoissanee, called by the Federals the affair at Blackburn’s Ford, was regarded at the time by the Confederates as a serious attack, and was dignified by the name of the “battle of Bull Bun,” the engagement of the 21st being called by them the battle of Manassas. The Confederates, feeling that they had repulsed a heavy and real attack, were encouraged by the result. The Federal troops, on the other hand, were greatly depressed. The regiment which suffered most was completely demoralized, and McDowell thought that the depression of the repulse was felt throughout.his army, and produced its effect upon the Pennsylvania regiment and the New York battery, which insisted (their terms having expired) upon their discharge, and on the 21st, as he expressed it, “marched to the rear to the sound of the enemy’s cannon.” Even Tyler himself felt the depressing effect of his repulse, if we may judge by his cautious and feeble action on the 21st when dash was required. The operations of the 18th confirmed McDowell in his opinion that with his raw troops the Confederate position should be turned instead of attacked in front. Careful examination had satisfied him that the country did not favor a movement to turn the enemy’s right. On the night of the 18th the haversacks of his men were empty, and had to be replenished from the provision wagons, which were late in getting up. Nor had he yet determined upon his point or plan of attack. While resting and provisioning his men, he devoted the 19th and 20th to a careful examination by his en- sudden movement of the army to turn the enemy’s right flank. The reconnoissanee showed him that the country was unfavorable to the movement, and he abandoned it. While he was gone to the left, Tyler, presumably to “ keep up the impression that we were moving on Manassas,” went forward from Centreville with a squadron of cavalry and two companies of infantry for the purpose of making a reconnoissanee of Mitchell’s and Blackburn’s fords along the direct road to Manassas. The force of the enemy at these fords has just been given. Beaching the crest of the ridge overlooking the valley of Bull Bun, and a mile or so from the stream, the enemy was seen on the opposite bank, and Tyler brought up Benjamin’s artillery, 2 20-pounder rifled guns, Ayres’s field battery of 6 guns, and Bichardson’s brigade of infantry. The 20-pounders opened from the ridge, and a few shots were exchanged with the enemy’s batteries. Desiring more information than the long-range cannonade afforded, Tyler ordered Bichardson’s brigade and a section of Ayres’s battery, supported by a squadron of cavalry, to move from the ridge across the open bottom of Bull Bun and take position near the stream and have skirmishers “scour the thick woods ” which skirted it. Two regiments of infantry, 2 pieces of artillery, and a squadron of cavalry moved down the slope into the woods and opened fire, driving Bonham’s outpost to the cover of intrenehmonts across the stream. The brigades of Bonham and Longstreet, the latter being reinforced for the occasion by Early’s brigade, responded at short range to the fire of the Federal reeonnoitering force and drove it back in disorder. Tyler reported that having satisfied