Journal of Surgeon Alfred L. Castleman.

11th.–Generals Hancock’s and Brook’s brigades started this morning, on a reconnoisance towards Sugar Loaf Mountain. There is no longer a doubt that the enemy is in possession of Frederick, and has been for some days. Reconnoitering party discovered no enemy in force. It has rained to-day, and I now prepare to lie down, sick and tired at the foot of the mountain.