102 United States Survey of the Territories. (February, — 
Fork to the northern portion of the Teton mountains, where 
he spent several weeks investigating this snow-covered range; 
then, crossing Pierre’s basin, surveyed the lofty group to which 
in 1872 he gave the name of Pierre's Hole mountains. These 
ranges are characterized by as great ruggedness and inaccessibil- ' 
ity as any other mountains in the north-west. : 
Fronting the Grosventre range on the north rises another 
mountain cluster, separated from the former by the Grosventre 
river. This range forms the divide between the latter river and — 
the Buffalo Fork of the Snake. It connects with the main Rocky 
mountains near the sources of Wind and Gosventre rivers and 
the Buffalo Fork of the Snake, and culminates near its western 
end in Mount Leidy. Mr. Bechler occupied two weeks in a care- 
ful survey of a part of the Grosventre range, the entire Mount 
Leidy group, with the Upper Snake River valley and its numerous 
interesting features. 
North of the Buffalo Fork of the Snake, his observations ex- 
tended into that densely wooded mountain region which connects 
to the north with the Mount Sheridan group near the Yellow- 
~ stone, Lewis and Shoshone lakes. 
About the 1st of September he left the waters of Snake river 
and marched along the rugged and densely timbered mountain 
spurs toward the Upper Wind River pass, and, after crossing the : 
latter, entered Wind River valley, having the Owl mountains on ~ 
the left and the Wind River range on the right. As he was — 
about to cross over the Warm Spring pass of the Wind River — 
mountains into the Green River valley to survey the southern — 
ends of the Grosventre and Salt River ranges, he received a notice — 
through Indian scouts, from the commander of the military post — 
at Camp Brown, to leave the country on account of the danger _ 
of hostile Indians, On this account nearly a month of valuable 
time was lost, abridging somewhat the results of the season's 
work. Notwithstanding the various difficulties which this party 
encountered, they surveyed an area of about 6,000 square miles 
of the most rugged mountain country in the north-west, and made 
one hundred and ten reliable observations with the mercurial 
barometer. Mr. Bechler, throughout his district, personally 4 
observed 7,340 horizontal angles and 5,700 angles of elevation 
and depression; they repeated backward and forward, and were 
= checked by good barometric observations. : 
Pree” ere alg 
