"Rivers are the natural highways of nations," says Humboldt. This route, then, is one of Nature's highways. The line is very direct. The country is mostly a rolling prairie, where a road may be constructed as easily as through the State of Iowa. It may be built with great rapidity. Parties working west from St. Paul and east from the Missouri would meet on the plains of Dacotah. Other parties working west from the Missouri and east from the Yellow Stone would meet on the "heavy-timbered river." Iron, locomotives, material of all kinds, provisions for laborers, can be delivered at any point along the Yellow Stone to within a hundred miles of the town of Gallatin, and they can be taken up the Missouri to that point by portage around the Great Falls. Thus the entire line east of the Rocky Mountains may be under construction at once, with iron and locomotives delivered by water transportation, with timber near at hand. The character of the country is sufficient to maintain a dense population. It has always been the home of the buffalo, the favorite hunting-ground of the Indians. The grasses of the Yellow Stone Valley are tender and succulent. The climate is milder than that of Illinois. Warm springs gush up on the head-waters of the Yellow Stone. Lewis and Clark, on their return from the Columbia, boiled their meat in water heated by subterraneous fires. There are numerous beds of coal, and also petroleum springs. "Large quantities of coal seen in the cliffs to-day,"[D] is a note in the diary of Captain Clark, as he sailed down the Yellow Stone, who also has this note regarding the country: "High waving plains, rich, fertile land, bordered by stony hills, partially supplied by pine."[E] Of the country of the Big Horn he says: "It is a rich, open country, supplied with a great quantity of timber." Coal abounds on the Missouri, where the proposed line crosses that stream.[F] The gold mines of Montana, on the head-waters of the Missouri, are hardly surpassed for richness by any in the world. They were discovered in 1862. The product for the year 1865 is estimated at $16,000,000. The Salmon River Mines, west of the mountains, in Idaho, do not yield so fine a quality of gold, but are exceedingly rich. Many towns have sprung into existence on both sides of the mountains. In Eastern Montana we have Gallatin, Beaver Head, Virginia, Nevada, Centreville, Bannock, Silver City, Montana, Jefferson, and other mining centres. In Western Montana, Labarge, Deer Lodge City, Owen, Higginson, Jordan, Frenchtown, Harrytown, and Hot Spring. Idaho has Boisee, Bannock City, Centreville, Warren, Richmond, Washington, Placerville, Lemhi, Millersburg, Florence, Lewiston, Craigs, Clearwater, Elk City, Pierce, and Lake City,--all mining towns. A gentleman who has resided in the territory gives us the following information:--