General Advertiser. No. 5156. Philadelphia: William Duane, Friday 24 July 1807." /> [LEWIS AND CLARK EXPEDITION]. "Prospectus of Lewis and Clark's Tour to the Pacific Ocean, through the Interior of the Continent of North America." In: <I>General Advertiser</I>. No. 5156. Philadelphia: William Duane, Friday 24 July 1807. | Christie's