Map shows the extent of mid-nineteenth century military outposts just west of the Mississippi River, the route of the Rifle Regiment [the Oregon Expedition] in 1849, roads, ocean, and river routes. U.S. Boundaries with British possessions and Mexico are highlighted. Transportation lines are depicted in red and blue, frontier stations in red, and boundaries in yellow. Relief shown by hachures. Scale not given.

Map shows districts of Ottawa to the west; Montcalm, Jolliette, Berthier, Maskinonge, Maurice, Champlain, and Port Neuf, to the northwest; Chicoutimi to the north; Sarguen and Temiscouata to the northeast; Lanar and Grenville in the southwest; Clinton, Franklin Orleans to the south, and Franklin, Somerset, Piscataquis, and Penobscot to the southeast; cities, railroads [?], lakes and rivers; counties [?] along the St. Lawrence River. Scale [ca. 1:2,200,000].