[Washington: 1862]. First Edition. Octavo (22.5cm.); removed; 85pp.; folding hand-colored map bound in rear, one additional full-page map in text. Light toning to extremities, else Very Good and fresh, map in fine condition. Reports chiefly made by James Wickes Taylor, special agent of the Treasury Department serving in northwest Canada during the Civil War. At head of title: 37th Congres, 2d Session, Ex. Doc. No. 146.