... one of the enemy's caissons, which he abandoned, and compelled him to advance in order of battle to compel us to desist. As Hancock had the right of way on my road, I sent Fitz. Lee's brigade to Gainesville to reconnoitre and devote the remainder of the day to grazing our horses, the only forage procurable in the country. The best of our information represented the enemy still at Centreville, Union Mi...