تا all‏ و ی و کی E‏ 
۱ 7 
EXPLORATIONS FROM A. D. 1843 To A. D. 1852. 55 
stream 48 miles, and then turned northwest 48 miles, to the town of Tucson. From this place 
he continued on by the present route, near the Picacho de Tucson to the Pimas villages on the 
Gila; and thence down that stream to its junction with the Colorado. Crossing the Colorado 
at this point, he proceeded over the desert to Warner's Ranche, and thence to San Diego. 
EXAMINATIONS BY A. WISLIZENUS, M. D., 1846-'47. 
The account and results of this form Senate Mis. Doc. No. 26, 1st session 30th Congress, and 
are entitled: '' Memoir of a tour to Northern Mexico, connected with Colonel Doniphan’ s Expedition, 
in 1846 and 1847. By A. Wislizenus, M. D., with a scientific appendix, and three maps. Wash- 
ington: Tippin & Streeper, printers.—1848.' These maps are, 1st, a map of the country from 
the 25th to the 39th parallel, between the 94th and 107th meridians, on a scale of 50 miles to 
an inch, exhibiting the topography of the route travelled over; 2d, a map or geological sketch 
of the same country, on a scale of 80 miles to an inch; and 3d, a barometrical profile of the 
route, on a horizontal scale of 36 miles to an inch, and a vertical scale of 2,000 feet to the inch, 
the vertical scale being 95 times the horizontal. 
Dr. Wislizenus undertook this scientific tour at his private expense. ene St. Louis in the 
spring of 1846, he followed the Santa Fé road, by the Cimarron route, to Santa Fé. Thence 
he went down the Rio Grande valley to El Paso and Chihuahua. Here the derangement which 
the Mexican war produced kept him for six months ‘‘in a very passive condition” On Colonel - 
Doniphan's arrival in that neighborhood, he accepted a situation in the medical department 
of the army, and returned with the troops, by way of Monterey, to the States. 
EXPLORATION OF BREVET CAPTAIN W. H. WARNER, TOPOGRAPHICAL ENGINEERS, 1847-48-49. 
Very little of the results of the exploration of Brevet Captain Warner, after he was relieved 
from duty with Major Emory, have been published. He made extensive examination of routes 
along the Pacific and in the Coast mountains, from San Diego to San Francisco, and had nearly 
completed his map of that then unknown section of country, when he was directed to make the 
exploration in the Sierra Nevada, on which he lost his life in an Indian ambuscade. His notes 
and papers passed into the possession of his assistant, Lieutenant Williamson, Topographical 
Engineers, and were thus available to him in his examinations made in 1853— 54, in connexion 
with a route for a railroad to the Pacific. 
The only portion of Captain ele aE Mio to my knowledge, of which a map and 
report were published, was that of his last expedition. This was prepared by Lieutenant Wil- 
liamson, and forms a portion of Senate Ex. Doc. No. 47, Ist session 31st Congress. The map 
of the route is on a scale of 15 miles to an inch. 
The party left Sacramento August 13, 1849, intending to survey as far as Humboldt river, for 
the purpose of finding a practicable railroad route through the Sierra Nevada. They ascended 
the Sacramento valley to Lassen’s, on Deer creek, struck east across the mountains to the valley 
of Pit river, crossed it, and followed its northern bank to its source. The song nens of the 
route compelled them to abandon their wheel vehicles. 
Being embarrassed by sickness, the want of able pack mules, and the lateness of the. season, 
Captain Warner decided to take a party of nine men and proceed to the north, leaving about an 
equal number with the sick, in charge of Lieutenant Williamson, in camp on Goose lake. 
Arriving at Lake Abert, he turned the eastern branch of the Sierra Nevada, and travelled south 
over nearly the same route as Captain Frémont in 1844. In about latitude 42° Captain Warner 
