Drewyer visited his traps & to day and Cought a fine fat beaver on which we feasted this evening and thought it a great delecessey.—.

I compleated a map of the Countrey through which we have been passing from the Mississippi at the Mouth of
Missouri to this place.

In the Map the Missouri Jefferson's river the S. E. branch of the Columbia or Lewis's river, Koos-koos-ke and Columbia from the enterance of the S. E fork to the pacific Ocian, as well as a part of Clark's river and our track across the Rocky Mountains are laid down by celestial observations and Survey. the rivers are also conected at their Sources with other rivers agreeably to the information of the nativs and the most probable conjecture arrising from their capacities and the relative positions of their respective enterances which last have with but fiew exceptions been established by celestial observations.

We now discover that we have found the most practicable and navigable passage across the Continent of North America; it is that which we have traveled with the exception of that part of our rout from the foot of the Falls of the Missouri, or in neighbourhood of the enterance of the Rocky Mountains untill we arive on Clarks river at the enterence of Travelers-rest Creek; the distance between those two points would be traveled more advantagiously by land as the navigation of the Missouri above the Falls is crooked laborious and 521 miles distant by which no advantage is gained as the rout which we are compelled to travel by land from the Source of Jeffersons River to the enterance of Travellers rest Creek is 220 miles being further by abt. 600 miles than that from the Falls of the Missourie to the last mentioned point (Travellers rest Creek) and a much worse rout if indian information is to be relied on which is from the So so nee or Snake Indians, and the Flatheads of the Columbia west of the rocky mountains.

from the Same information the Columbia from the enterance of the S. E. branch to the enterance of Clark's river is obstructed with a great number of dificuelt and dangerous rapids (and the place Clark's river comes out of the Rocky mountains is a tremendious falls &c which there is no possibillity of passing the mountains either by land or water.) Considering therefore the dangers and deficuelties attending the navigation of the Columbia in this part, as well as the circuitous and distant rout formed by itself and that of Clark's River we Conceive that even admitting that Clarks river contrary to information to be as navagable as the Columbia below it's enterance, that the tract by land over the Rocky Mountains usially traveled by the nativs from the enterance of Travellers rest Creek to the Forks of the Kooskooske
is preferable; the Same being a distance of 184 miles.

The inferrence therefore deduced from these premises are, that the best and most practicable rout across the Continent is by way of the Missouri to the Great Falls; thence to Clarks river at the enterance of Travellers rest Creek, from thence up travillers rest Creek to the forks, from whence you prosue a range of mountains which divides the waters of the two forks of this Creek, and which still Continues it's westwardly Course on the mountains which divides the waters of the two forks of the Kooskooske river to their junction; from thence to decend this river to the S. E. branch of the Columbia, thence down that river to the Columbia, and down the Latter to the Pacific Ocian—.