5th.—10 o’clock P. M. Have just received an order to cook three days’ rations, and be prepared to move at a moment’s notice. I do not know where we go, but presume into Maryland, to resist the advance of Lee and Jackson, who we hear are crossing at Harper’s Ferry and pushing towards Frederick, and perhaps towards Harrisburg, Pennsylvania. If they have crossed with their hundred thousand men, and we cannot now, with our large force, hem them in and capture them, we deserve to be beaten. Will General McClellan let us take them, if we can?
