Persons undergoing severe labor, and driven to great extremities for food, will derive sustenance from various sources that would never occur to them under ordinary circumstances. In passing over the Rocky Mountains during the winter of 1857-8, our supplies of provisions were entirely consumed eighteen days before reaching the first settlements in New Mexico, and we were obliged to resort to a variety of expedients to supply the deficiency. Our poor mules were fast failing and dropping down from exhaustion in the deep snows, and our only dependence for the means of sustaining life was upon these starved animals as they became unserviceable and could go no farther. We had no salt, sugar, coffee, or tobacco, which, at a time when men are performing the severest labor that the human system is capable of enduring, was a great privation. In this destitute condition we found a substitute for tobacco in the bark of the red willow, which grows upon many of the mountain streams in that vicinity. The outer bark is first removed with a knife, after which the inner bark is scraped up into ridges around the sticks, and held in the fire until it is thoroughly roasted, when it is taken off the stick, pulverized in the hand, and is ready for smoking. It has the narcotic properties of the tobacco, and is quite agreeable to the taste and smell. The sumach leaf is also used by the Indians in the same way, and has a similar taste to the willow bark. A decoction of the dried wild or horse mint, which we found abundant under the snow, was quite palatable, and answered instead of coffee. It dries up in that climate, but does not lose its flavor. We suffered greatly for the want of salt; but, by burning the outside of our mule steaks, and sprinkling a little gunpowder upon them, it did not require a very extensive stretch of the imagination to fancy the presence of both salt and pepper. We tried the meat of horse, colt, and mules, all of which were in a starved condition, and of course not very tender, juicy, or nutritious. We consumed the enormous amount of from five to six pounds of this meat per man daily, but continued to grow weak and thin, until, at the expiration of twelve days, we were able to perform but little labor, and were continually craving for fat meat. The allowance of provisions for each grown person, to make the journey from the Missouri River to California, should suffice for 110 days. The following is deemed requisite, viz.: 150 lbs. of flour, or its equivalent in hard bread; 25 lbs. of bacon or pork, and enough fresh beef to be driven on the hoof to make up the meat component of the ration; 15 lbs. of coffee, and 25 lbs. of sugar; also a quantity of saleratus or yeast powders for making bread, and salt and pepper.