The enterprise would involve traversing fifty miles of mountain country by night, at the rate of about ten miles each night, carrying arms, ammunition, blankets, and a week's rations, with the frequent necessity of camping without fire in February, and with the certainty of detection in case of snow. It would include crossing the Potomac, possibly at a point where there was neither a bridge nor a ford. It would culminate in an attack on a building with a wall fourteen feet high, with two sentinels outside and twenty-five inside; with a certainty of raising the town in the process, and then, if successful, with the need of retreating, perhaps with wounded men and probably by daylight. These were the difficulties that Montgomery, as our leader, had to face; and although, in