Colonel Devens embarked his men on the boats about three o'clock in the morning. The soldiers pushed them to the foot of the bluff, then returned for other detachments. The men went up the path and formed in line on the top of the bluff. By daybreak he had five companies on the Virginia shore. He moved through the open field towards the encampment which Captain Philbrick and his men had seen, as they thought, but which proved to be only an opening in the woods. But just as the sun's first rays were lighting the Catoctin hills he came upon the Rebel pickets in the woods beyond the field. The pickets fired a few shots and fled towards Leesburg, giving the alarm.
The town was soon in commotion. The drums beat, the Rebel troops then rushed out of their tents and formed in line, and the people of the town jumped from their breakfast-tables at the startling cry, "The Yankees are coming!"
General Evans, the Rebel commander, the day before had moved to Goose Creek to meet General McCall, if he should push beyond Dranesville. He had the Eighth Virginia, the Thirteenth, Seventeenth, and Eighteenth Mississippi Regiments, and a squadron of cavalry and four pieces of artillery.
Captain Duff, commanding a detachment of the Seventeenth Mississippi, was left at Leesburg. As soon as Colonel Devens's advance was discovered, he formed his men in the woods and sent word to General Evans, who hastened with his whole brigade to the spot.
General Stone placed Colonel Baker, commanding the First California Regiment, in command of the forces upon the Virginia side of the river. Colonel Baker was a Senator from Oregon,—a noble man, an eloquent orator, a patriot, and as brave as he was patriotic. During the forenoon a portion of the Twentieth Massachusetts Regiment, commanded by Colonel Lee, was sent over.
Just before twelve o'clock General Stone sent word to Colonel Baker that the force of the enemy was supposed to be about four thousand. Colonel Baker was in doubt whether to remain or whether to send over more troops; but word came to him that the Rebels were advancing, and he ordered over the Tammany Regiment of New York troops, commanded by Colonel Cogswell, and Lieutenant-Colonel Wistar's California Regiment. Colonel Baker went over about two o'clock in the afternoon. By constant effort, he succeeded in getting about seventeen hundred men over during the day, and three cannon,—two mountain howitzers and one rifled gun. It was nearly three o'clock in the afternoon before General Evans began the attack. He had captured a courier the day before, sent by General McCall to General Meade, and from the despatches learned that General McCall was only making a reconnaissance. This information led him to bring all his forces back to Leesburg, and it also delayed his attack until late in the afternoon.
Captain Duff, of the Seventeenth Mississippi, was reinforced first by four companies of the Thirteenth and Eighteenth Mississippi, commanded by Colonel Jennifer. About two o'clock the Eighth Virginia arrived from Goose Creek, commanded by Colonel Huntoon. Other reinforcements were near at hand.
"Drive the Yankees into the river!" was General Evans's order.