General McClellan, anxious to ascertain whether any movement of the forces at Leesburg and Dranesville had been made, directed General McCall, on the 18th, to push a reconnoissance in force in the direction of Dranesville. General McCall penetrated to that town, found that the enemy had evacuated the place, and was informed that Leesburg had also been abandoned.
While this reconnoissance was progressing, General McClellan informed General Stone of the fact, and directed him to make careful observations of the movements of the enemy, to ascertain what effect was produced by the expedition of General McCall. He also suggested that a slight demonstration on his own part might be successful in expediting their removal.
In obedience to these orders, General Stone, on the 20th, made a feint of crossing the river at Edwards Ferry, while four companies of the Fifteenth Massachusetts were sent to Harrison’s Island, in the Potomac, situated between Edwards and Conrad’s Ferries. At ten o’clock, P. M., Lieutenant Howe, Quartermaster of the Fifteenth Massachusetts, reported that Lieutenant Philbrick had returned to the island from his reconnoissance to Leesburg, and that he had been within one mile of that place, discovering only a small encampment of thirty tents, and without encountering any of the enemy—no pickets being out at any distance from their camp.
The Federal forces in that vicinity were then posted as follows:—General Stone, with General Gorman’s brigade, Seventh Michigan, two troops of Van Alen cavalry, and the Putnam Rangers, at Edwards Ferry; five companies of Massachusetts Volunteers, under Colonel Devens, at Harrison’s Island; and Colonel Lee, with a battalion of the Massachusetts Twentieth, a section of the Rhode Island battery, and the Tammany regiment, were sent to Conrad’s Ferry. A section of Bunting’s New York battery was planted at Edwards and a section of Rickett’s battery at Conrad’s Ferry.
When the report of the scouts was received, orders were sent to Colonel Devens to march four companies to the Virginia shore, from Harrison’s Island, and under cover of the night, take up a position near the camp referred to, and attack it at daybreak, drive out the enemy, pursue them as far as prudent, and return to the island. Orders were also sent to Colonel Baker, to march the First California regiment to Conrad’s Ferry, to arrive there at sunrise, and to have the remainder of his brigade ready to move at an early hour.
Lieutenant-Colonel Wood, of the Fifteenth Massachusetts, was also ordered to move with a battalion to the river bank opposite Harrison’s Island by daybreak. Two mounted howitzers in charge of Lieutenant Trench, of Rickett’s battery, were ordered to the tow-path of the canal opposite Harrison’s Island.
This disposition of the troops having been made for the commencement of the movement, it was necessary to provide the means for their transportation across the river, which is quite rapid at this point. Edwards Ferry is below the island, which is about three miles in length, and Conrad’s Ferry is a short distance beyond the upper end. The island lies about a third of the distance from the Virginia shore, while a swift current of three hundred yards separates it from the Maryland banks, traversed by a tow-path of the Chesapeake and Ohio canal. The Virginia bank opposite the island is steep, and is backed by a precipitous bluff, varying in height from eighty to one hundred and fifty feet, covered with brush, trees and undergrowth.
There was no adequate preparation to effect the passage of troops at these points. The means were scanty either for reinforcement, or for retreat, if that should become necessary. On the Maryland side of Harrison’s Island were two scows, capable of carrying thirty persons each, which could make two trips hourly, thus conveying one hundred and twenty men. On the Virginia side was one scow and a small boat. At Edwards Ferry there were two scows and a ship’s yawl. With these insufficient means of transportation an attempt was made to land the forces on the opposite shore.
The landings at both of the ferries are good, but stretching almost the entire distance between them is the high and steep bank known as Ball’s Bluff, where the crossing was attempted, and which has given its name to this bloody struggle.
Passing along and up the steep and difficult way from the landing below the bluff until it turns at the top, the road enters an open field of some six acres, surrounded on all sides by a forest. In this field the battle took place, the rebel forces being posted in the woods.