"Let's get the burros, now, and I'll show you a place where we can lunch while I tell you how Grandfather and I got to know each other so well," suggested Polly. As the girls rode along the up-trail, Polly told the story. [A]"A few years ago, while out adventuring, I found this colony of beavers. I wanted father to come with me and see them, but he was too busy that year. [Footnote A: A true story.] "The following Summer, however, he came and we sat on the same rock where you and I sat to-day. "We had to wait for ten minutes or more, before a beaver came out of his hut in the dam. It was not as large or strong a dam, then, as now. The beaver was anxious to reach a spot in the aspen grove where we could hear the other beavers at work. "To reach the grove, he had to come up out of the stream and cross some land to the other pond. Just as he climbed up from the water, he sniffed danger. He was directly opposite us and we could see everything very plainly. "Father lifted his rifle slowly and very carefully, and I looked intently to see what it was that he saw. "On a bough of a tree almost directly over the beaver, I saw a lithe serpentine thing twitching as if a snake was trying to curl up. But I knew it wasn't a snake. It must be the long tail of a panther who was crouching for a leap, but I could not distinguish a body back of the foliage of the tree. "The beaver stood uncertain of action for a moment, and as he turned to dive again to safety, the mountain-lion sprang. At the same instant, father pulled the trigger. But the panther landed almost on top of the beaver's back, while the shot must have grazed his head, making him rage furiously. "The beaver, who was on the verge of the stream, fought valiantly with teeth and his powerful strength, but the lion had the upper hold on him. Slowly the two squirmed and rolled, the beaver trying to drag his enemy into the stream, and the panther fighting to keep his prey on land. "'Father--shoot--shoot! Even if you kill the beaver!' I yelled, as I closed my eyes from the awful sight. "But daddy already had taken aim and even as I spoke, he pulled the trigger. This time his shot took effect for we saw the beast loose his hold on the beaver and roll over writhing in agony. "Father rushed along the bank and crept over the beaver-dam to the other side. Then he put the lion out of pain with a third shot, and stooped to examine the beaver. "We always take a doctor's pocket-case when going on a trip, and father now took it out, so I knew the beaver was not dead. "'Poll, try to come over here and bring a pan, sheath-knife, and some hartshorn from the pack.' "I did as I was told, and stood helping father when the beaver came too--after getting a big whiff of hartshorn. We washed the torn flesh with water, and father poured on something from a bottle that made the old fellow squirm, but he sensed that we were helping him and he offered no resistance.