EXPLORATIONS FROM A. D. 1852 To A.D. 1857. | 13 
Root range, as far as the Kootenay river. The route pursued was that along the Bitter Root 
river; thence to Flathead river, by way of the Jocko river; thence by the west side of Flat- 
head lake; thence up the valley of Maple river to its source; and thence across the divide, 
between it and the Kootenay river, to this latter stream. The return route was down the 
valley of Hot Spring creek to Flathead river; and thence by the Jocko and Bitter Root rivers 
to the place of departure. 
Lieutenant Mullan finally left the Bitter Root valley on the 19th of September, 1854, passed 
up the Looloo Fork and through the Bitter Root mountains; and thence by way of the Koos- 
koosky to Fort Walla-Walla, his route being nearly that of Captains Lewis and Clarke in 
1805-6. 
The reports of each of the reconnaissances made by the subordinates of Governor Stevens’ 
expedition will be found with his printed report; and the various maps of these routes were 
compiled by Mr. Lambert on the map that accompanies it. Governor Stevens also made 
additional examinations in 1855, in connexion with his official duties with the Indians, and the 
results will be published in a supplementary volume. ۹ 
SURVEY BY LIEUTENANT R. ARNOLD, 1854. 
In the summer of 1854 Lieutenant R. Arnold, third artillery, made an odometer survey and 
map of a road which he opened from Puget Sound to Walla-Walla, through the Nachess Pass, 
over nearly the same route reconnoitred by Lieutenant Hodges, of Captain McClellan’s party 
in 1853. His report will be found as an appendix to the annual report of Colonel J. J. Abert, 
‘Topographical Engineers, forming part of Senate Ex. Doc. No. 1, 1st session 34th Congress. 
EXAMINATIONS BY MR. F. W. LANDER, CIVIL ENGINEER, 1854. 
The report of Mr. Lander forms part of House Ex. Doc. No. 129, Ist session 33d Congress, 
and is reprinted in the quarto edition of Pacific Railroad Reports, Vol. IT, Senate Ex. Doc. No. 
78, and House Ex. Doc. No. 91, 2d session 33d Congress. The report is unaccompanied by 
maps or sketches. 
Mr. F. W. Lander returned to the States in 1854 by the emigrant road up the valley of the 
Columbia; thence across the Blue mountains through the Grande Ronde; thence up Snake river 
and across to Bear river; and thence by the usual travelled road through the South Pass and 
down the Platte river to Missouri: 
The journey was undertaken by him at the request of citizens of Oregon and Washington 
Territories, to endeavor to find a railroad route in this direction. Although he examined 
several approaches to the Blue mountains from the west, he found no practicable railroad route, 
as time and means did not permit him to reconnoitre this portion as fully as he intended. It 
was also his design to examine a route from the source of Snake river, over the mountains, to 
the head of Green river, but an accident to himself prevented this. His examinations tended 
to confirm the opinion of the difficult nature of the route west of the South Pass. 
EXPLORATION AND SURVEY FOR A RAILROAD ROUTE TO THE PACIFIC, NEAR THE THIRTY-EIGHTH AND 
THIRTY-NINTH PARALLELS, UNDER CAPTAIN J. W. GUNNISON, TOPOGRAPHICAL ENGINEERS. 
The report of this examination was made by Captain E. G. Beckwith, United States artillery, 
and forms part of Volume II of the quarto edition of the Pacific Railroad Report, Senate Ex. 
Doc. No. 18; House Ex. Doc. No. 91, 2d session 33d Congress. The maps were prepared by 
Mr. F. W. Egloffstein, and are in four sheets, on a scale of twelve miles to an inch. 
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