"Still," urged the other, "he may have come back here again when he found he could not overtake Mayhew and secure that paper. A man like François Lascelles hates bitterly, and never forgives. To be beaten in his game by a couple of mere boys would make him gnash his teeth every time he remembered it. Yes, something seems to tell me, Roger, that our old enemy has returned, and is even now in communication with some treacherous member of the expedition." "You mean his money has hired some one to play this terrible trick that might have cost us our lives; is that it, Dick?" "It is only a guess with me," replied the other, soberly; "but I can see no other explanation of this mystery." "But who could be the guilty man in the camp?" asked Roger. "We believed every one was our friend, from the two captains down to the lowest in line. It is terrible to suspect any one of a crime like this. How will we ever be able to find out about it, do you think?" "We must begin to keep our eyes about us and watch," advised Dick. "One by one we can cross the names off our list until it narrows down to two or three. Sooner or later we shall find out the truth." "Do you mean to tell Captain Lewis about the knife-slit along the bottom of our boat?" demanded Roger. "It is our duty to tell him," Dick declared. "The man who could stoop to such a trick as that, just for love of money, is not fit to stay in the ranks of honest explorers. Once we can show him the proof, I am sure Captain Lewis will kick the rascal out of camp. But I can see that you are beginning to shiver, Roger; so the first thing we ought to do now is to make a fire, and dry our clothes as best we may." "I was just going to say that myself, Dick, because this spring air is sharp, with little heat in the sun. To tell you the honest truth my teeth are beginning to rattle like those bones the Mandan medicine man shakes, when he dances to frighten off the evil spirit that has entered the body of a sick man. So let's gather some wood and make a blaze." With that, both boys began to bestir themselves, first of all slapping their arms back and forth to induce circulation; after which they started to collect dry wood in a heap. At no time, however, did they let their precious guns leave their possession, for they knew that when fire-arms were needed it was usually in a hurry, and to save life. CHAPTER III WOLVES IN THE TIMBER "LET me light the pile, Dick," Roger pleaded, after they had made sufficient preparation. They had selected only dry wood for various reasons. In the first place, this would burn more readily, and thus throw off the heat they wanted in order to dry their clothes. At the same time it was likely to make little smoke that could be seen by the eyes of any hostile Indians who might be within a mile or so of the spot.