There is a vast amount of difference in wood. Well-seasoned stuff of a certain variety will burn, and give off hardly any smoke; on the other hand, if the fuel is partly green, or obtained from a certain species of tree, it will send up a black column that can be seen a long way off. When hunters or Indians wish to communicate with each other, even though miles apart, they take this latter kind of wood for their fire; but, when they desire to do some cooking while in the enemy's country, with keen eyes on the watch around them, it is of course necessary to attract as little attention as possible, and on that account the kind of fuel that gives out no betraying smoke is chosen. Of course this was what Dick and his two companions now did; and also the fire was built in a depression among the rocks so that it might not be too prominent. Here they busied themselves cooking small pieces of the elk meat. Their method of doing it was exceedingly primitive, for it was thrust close to the fire by means of long splinters of wood, and turned around until well scorched, when it was devoured with much satisfaction. It requires a vigorous appetite to really enjoy cooking of this type. Many boys of to-day would turn up their noses at such food, and go hungry for a while, though in the end they might come around and ask for a portion. They spent half an hour about that small cooking-fire. At the end of this time all admitted that they were satisfied, and could not eat another bite. However, at Dick's suggestion, some more of the elk meat was cooked, to serve them for a "snack" in case circumstances should not allow them to light a fire later on. It was Dick who always thought of the future. Roger, with his happy-go-lucky ways, was, as a rule, content to consider only present necessities. When he had eaten, and felt satisfied, he did not know why any one should borrow trouble thinking of something far in the future. In fact, he generally took to heart that passage he had heard his father read from the Good Book at home, "sufficient unto the day is the evil thereof," and applied it to many ordinary occurrences. After leaving the place where they had enjoyed this good breakfast, of which all of them were in such need, they laid out a course that would take them to a section of the country that they had not as yet visited. All the time they could hear occasional strange roaring or hissing sounds that aroused the utmost curiosity, for they did not know at what moment they would come upon some new and startling mystery. This enchanted land was apparently the home of innumerable weird sights such as a white man had never before set eyes on; and, as they continued to advance, they were constantly reminded of this fact. So, when Roger, who was a trifle in the advance, called out that they were face to face with a gigantic "paint pot," the others held their breath as they pushed on to see with their own eyes what he could mean. CHAPTER XVIII