... night lay down without blankets or food upon the snow, to be up and moving again at dawn. When Shields and Fremont were closing in on Jackson's rear, they marched in one day from Harper's Ferry to Strasburg , nearly fifty miles. On the advance in August, 1862, to the Second Manassas, they passed over nearly forty miles, almost without a moment's rest; and as Jackson rode along the line which was still mo...