"Now it would seem that Clark was taking a good many chances, because all he had done was to write a note which might have been lost, and to scratch a few words in the sand which might have been washed out. But the luck of Lewis held until August 11th. On that day, as you remember, he was accidentally shot through the hips by one of his men while hunting elk, so that when, on August 12th, he finally overtook Captain Clark, Lewis was lying in his boat, crippled. All through the trip Lewis had had many more dangerous situations and narrow escapes than Clark had. "In this way, traveling many times faster coming east than they had going west, these two young men, and all of their widely scattered parties, met in this singular reunion, at no place in particular, without ever having had any reason in particular for hoping they ever would meet at all! "But they did hope. And they did meet. And if you put it to me as an engineer, young gentlemen, I shall say that was the most extraordinary instance of going through unknown country on workmanlike basis I ever heard of in all my life! Nor do I think all the world could produce its like." They sat in wondering silence for a time, marveling at the perfect ability shown by these young army officers in this formerly wild and unknown country. Uncle Dick closed the pages of his _Journal_, which he had been following through rapidly, and seemed inclined to talk no further. "You tell it, Billy!" said Jesse, turning to Billy Williams, who had been an attentive listener on the opposite side of the table. "You mean that I shall bring up the Clark story?" The boys assented to this. Billy went on, his finger now on the map in turn. "Take Clark along in here on the Gallatin, near this ranch, say July 15th, about one month ahead of our date now. He is going east with his party. He has got the Indian girl and some horses and some good men. All right. On July 15th he starts across the Divide, heading for the Yellowstone Valley. "Naturally, he found that plumb easy. He struck into one of the creeks that run down into the Yellowstone. It was only nine miles down that to the Yellowstone River itself, and they hit that just a mile below where it comes out of the Rockies from up yonder in Yellowstone Park, where we all were only yesterday. "Clark had the easiest end of it, in some ways. He said he had to go only forty-eight miles from the Three Forks to hit the Yellowstone. If he had poled a canoe up the Gallatin, he would not have had to portage over eighteen miles. "Those are the distances that Clark estimates, but for once he underestimates, I don't know why. Wheeler points out that from Three Forks to Livingston is fifty-four miles, and Clark came down off the Divide at a place just above Livingston. Anyhow, I'll bet he was glad when he saw the old Yellowstone Valley. He had horses now, you see, and he was hitting the trail hard.