GENERAL ORDER. 43 
Horner, of the engineer detachment, is continued on duty with the naturalist, as an aid. The 
services he has rendered are entitled to notice. 
8. All matters petaining to Indians will be referred, in all cases where practicable, to the 
chief of the expedition ; and all persons are enjoined to carry out the mild, humane, but firm 
policy, as instructed by those having charge of our Indian affairs. To this end reasonable 
issues of provisions will be made, and, under regulation, free access to camp will be permitted. 
But all men are enjoined to be on their guard, and the general deportment of the camp should 
be vigilant to prevent stampede of animals and the loss of single men. 
The interpreters employed must be used in intercourse with the Indians, to guard against 
misunderstanding, and that their real wants may be known. In the absence of the chief of 
the expedition, reference must be had to Mr. Culbertson, special agent among the Blackfeet 
Indians. 
9. The chief of the expedition cannot omit this opportunity to acknowledge the great ser- 
vices of Lieutenants Donelson and Grover: the former for his elaborate survey of the Mis- 
souri river to above Fort Union, and his reconnaissance of the country in the vicinity of Fort 
Union, from the White Earth to the Big Muddy rivers. The survey of the Missouri, prosecuted 
under great difficulties, was not only very complete, affording even the data for prosccuting 
operations to make it more navigable, but was enriched with large collections in geology and 
natural history, and illustrated by characteristic views. The reconnaissance from the White 
HKarth to the Big Muddy was necessary to complete the work of the overland parties. In this 
work the services of Lieutenant Mullan and Mr. Graham have largely contributed, and their 
services deserve special commendation. The services of Sergeant Collins, of the engineer 
detachment, particularly in the topographical survey of the Missouri river, deserve notice; 
they not only reflect credit on the company to which he belongs, but bespeak for him a career 
of future usefulness. 
Lieutenant Grover, deflecting from the course of the main party at an early stage in its 
march, and taking charge of a small detached party at a period when such service was con- 
sidered one of peril, steadily contended with and overcame all obstacles and difficulties, and, 
with the eye of an engineer marking out his course, reached Fort Union seven days before the 
main party. The chief of the expedition would do injustice to his appreciation of Lieutenant 
Grover’s services if he failed to express his admiration and respect for them. In this connexion 
is noticed the valuable aid afforded to Lieutenant Grover by Mr. Evelyn, in charge of the train, 
and Corporal Cunningham, of the sappers and miners, in charge of the odometer and compass 
on that line. Their services are deserving of warm commendation, 
The services of Lieutenant Mullan in relation to the survey of the Missouri, and the recon- 
naissance from the White Earth to the Big Muddy rivers, have been of the most marked 
character, and entitle him to especial commendation. Particularly has he brought up the 
meteorological observations to a proper standard, and taken charge of the collections. His 
services in training assistants have been most valuable. 
Mr. Graham, who had charge of the astronomical observations under direction of Lieutenant 
Donelson, deserves especial notice for his efficient services, rendered amidst many trying 
difficulties. Acknowledgments are due to the civil engineers, Messrs. Lander and Tinkham: 
Mr. Lander, for his examination and report on the crossing of the Mississippi, his reconnais- 
sance of the Cheyenne valley, of the Dog’s House, and of the Mouse river and the Coteau du 
Missouri, and for the consummate judgment and great experience which he has brought to his 
department of the work; and Mr. Tinkham, for the admirable compass line, connecting the 
geographical positions, which he has run half across the continent, and for valuable topo- 
graphical and statistical information collected on the route. Mr. Bixby, in charge of the 
compass, did not even seem conscious of difficulties or obstructions in his course. 
The expedition has been most fortunate in its surgeon and naturalist, Dr. Suckley. Not 
