. Reports upon the survey of the boundary between the territory of the United States and the possessions of Great Britain from the Lake of the woods to the summit of the Rocky mountains . time the long-expected steamer made her appear-ance, having left, however, the main part of her stores at Cow Island, onehundred and twenty miles down the river. I sent a train, imder charge ofLieutenant Ladley, to bring up what forage was required; and having sentanother supply-train with the necessary supplies to the Sweet Grass Hills,I returned to my camp on the Sandy. From this camp, accompanied by Major
. Reports upon the survey of the boundary between the territory of the United States and the possessions of Great Britain from the Lake of the woods to the summit of the Rocky mountains . time the long-expected steamer made her appear-ance, having left, however, the main part of her stores at Cow Island, onehundred and twenty miles down the river. I sent a train, imder charge ofLieutenant Ladley, to bring up what forage was required; and having sentanother supply-train with the necessary supplies to the Sweet Grass Hills,I returned to my camp on the Sandy. From this camp, accompanied by Major Reno, I marched to the EastButte of the Sweet Grass Flills, where the escort had established their per-manent camp. I there learned that Captain Gregorys camp was only eightmiles distant, though with rough country between. I therefore sent mytrain by the trail, and, riding directly across, found Captain Gregory campedon a small pool of water about two miles south of the lino. LieutenantGreenes advance party was reported to be only a few miles back, and thesupply-train from Fort Benton, passing between the first and second buttes,were expected to reach the West Butte the next REPORT OF THE CHIEF ASTRONOMER. 77 On the following day I moved my camp to the West Butte, andencamped on a small brook about one mile north of the line, where thepermanent depot was established. This depot was established on the 1st ofAugust. Captain Gregory and the advanced parties of Lieutenant Greenewere immediately supplied, and pushed forward without delay. The work advanced rapidly, and at the end of August our line hadbeen joined by traverse with that of the old northwestern boundary survey,on the summit of the Rocky Mountains, and the survey was complete. I then concentrated the parties at the suppl) depot at the Sweet GrassHills, and having detached Lieutenant Greene to carry a meridian from theline to Fort Shaw, in order to get a telegraphic connection for longitude, Ileft the Sweet Grass H
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