STEPHEN HARRIMAN LONG - (1784-1864) - Army Engineer, born Hopkinton, H.H. Graduated at Dartmouth College (1809), taught school, and entered Army engineer corps (1814). Headed party which explored region between Mississippi and Rocky Mountains (1818-23); highest peak of Rockies was named for him. In course of second journey (1823-24), traveled by way of Mississippi and Minnesota Rivers to Red River of the North, and continued to Canadian boundary. Thereafter engaged in railroad engineering, surveying route for Baltimore and Ohio Railroad (1827-30) and becoming engineer-in-chief of Western and Atlantic Railroad (1837-40). Introduced new type of trussed-frame wooden bridge, which was named for him. His Railroad Manual (1829) was first textbook of its kind published in America.