On arriving at Frederickton, Colonel Plummer found that the rebels had evacuated the town the evening before, and that Colonel Carlin, with about three thousand Federals from Pilot Knob, had occupied the place a few hours before him. The enemy had retired in the direction of Greenville, and Colonel Carlin having reinforced Colonel Plummer with the Twenty-first and Thirty-third Illinois Volunteers, under Colonels Alexander and Hovey, six companies of the First Indiana Cavalry, Colonel Baker, and one section of Major Schofield’s battery, under Lieutenant Hascock, they started in pursuit. The column, thus reinforced, was put in motion at about one o’clock, P. M., but had not proceeded more than three-quarters of a mile when the enemy was discovered a short distance in advance. Colonel Ross, whose regiment was the leading one of the column, immediately deployed it to the left into a lane, and threw forward two companies as skirmishers, to feel the enemy, whose exact position and strength it was difficult to determine. Colonel Plummer directed Colonel Ross to move forward his regiment into the cornfield in support of his skirmishers, and ordered up Lieutenant White’s section of Taylor’s battery, which immediately opened fire, and by its effectiveness soon caused the enemy to respond. Their artillery consisted of four pieces, masked, upon the slope of a hill about six hundred yards distant. The principal body of their infantry, under Colonel Lowe, was posted in the cornfield to the left of the road. With them the Seventeenth Illinois was soon engaged. The other regiments of the column were deployed to the right and left of the road as they came up. Colonel Plummer then ordered forward the Thirty-eighth Illinois from the town, which promptly came upon the field under one of its field officers, leaving there the Eighth Wisconsin, under Colonel Murphy, and one section of Major Schofield’s battery in reserve—a post of honor, though one disagreeable to them, as all were eager to participate in the engagement. As soon as it was practicable, Major Schofield, of the First Missouri Volunteer Light Artillery, brought upon the field two sections of his battery under Captain Matter and Lieutenant Hascock, which were placed in position, and did efficient service. Major Schofield rendered valuable aid in bringing the regiments on the right of the road into line of battle, and in directing their movements. In the mean time the enemy were falling back before the steady advance and deadly fire of the Seventeenth and Twentieth Illinois, and a portion of the Eleventh Missouri. Their retreat soon became a rout, and they fled in every direction, pursued by the Union troops. [Illustration: UNION HEROES GRANT. WALLACE. BUELL. SIGEL. POPE.]