Monday, 19th—Weather pleasant. Reveille sounded at 1 a. m. and at 2 o’clock our brigade started for the rifle pits in front of Savannah. The first brigade was left at the bridge to guard the landing and to unload the boats. A little before daylight, unnoticed by the rebels, we passed over the same causeway that we went down on, and after marching about nine miles we formed a line of battle and sent out skirmishers. We soon drove the rebels across the swamp. They used grape and canister on us, but did little harm. At all the points where they have the roads blockaded, we have planted sixty-four-pounders, which keep their guns silent. There is some heavy cannonading and brisk skirmishing all along the lines.