Note 62, page 222: Aluminum is not dangerous to cook in. Tin sometimes unites with acids in foods, or in certain liquids, and gives off a poison. Tin also rusts, but aluminum does not. And aluminum is much the lighter in weight, and is a better heat conductor, therefore cooking quicker. Note 63, page 223: "Levez!" is what the old-time scouts-trappers ought to have said. It is the French for "Rise! Get up!" But some trappers said "Leve! Leve!" and some called "Lave!" thinking that they were using the Spanish verb "Lavar," meaning to wash. CHAPTER XIX Note 64, page 236: Scouts should bear in mind that practically every illness demands a cleaning out of the bowels, by a prompt laxative or by a mild cathartic, in the very beginning. This carries off the poisons that feed the illness. And Scouts should bear in mind that for a pain which indicates appendicitis, an ice-cold pack and not a hot pack is the proper application. The ice-cold pack drives the blood away from the appendix, and keeps it more normal until the surgeon can arrive. A hot pack draws the blood to the region and congests or swells the appendix all the more. Irritated thus, the appendix is apt to burst. The prompt attention to the bowels is _always_ necessary. CHAPTER XX Note 65, page 251: In the dark a horse or mule will smell out the trail where other horses and mules have passed. The mule has been supposed to have a better nose than the horse, for trails and for water--and for Indians. In the camps of emigrants and trappers and other overland travelers, of the old days, the mules would smell approaching Indians and give the alarm. CHAPTER XXI Note 66, page 260: Among the Western Indians their scouts were especially selected young men, and these were likened to wolves. They were instructed "to be wise as well as brave; to look not only to the front, but to the right and left, behind them, and at the ground; to watch carefully the movements of all wild animals, from buffalo to birds; to wind through ravines and the beds of streams; to walk on hard ground or where there is grass, so as to leave no trail; to move with great care so as not to disturb any wild animals; and to return with much speed should they discover anything to report." When the scout returned with news of a war-party, he howled like a wolf. "To scout" was the wolf sign, with the hand turning to right and to left and downward, like wolf ears pricking in all directions.