Note 002 — Chapter I

Allegheny arsenal is on the Pittsburg side of Allegheny River, opposite the upper end of McCullough's Island. The grounds lie between Thirty-ninth and Fortieth streets. The site was purchased in 1814; a wall inclosing the grounds was completed in 1829. The arsenal was for many years used in the manufacture of war materials, a force of twelve hundred men being employed there during the War of Secession. Since 1868 it has been used as a military post, and as a quartermaster's depot. There were recently (1904) discovered there the principal documents relating to the equipment of the Lewis and Clark expedition, which was largely outfitted therefrom.—Ed.