“I know you didn’t. I was saying that there is no need of haste in going after that deer, because the tracks were made this morning, and the marshy thicket toward which the deer was making his way is sufficiently rich in succulent grasses and juicy young cane to occupy his mind for the entire day, and several days. A little later we’ll cut off his retreat on the land side of the point, and if we don’t get him the fault will be with our inexpertness with our guns.”

“That’s all right, Cal,” broke in Larry, “and I’m glad you’ve marked down the deer; but just now I must be off to plan our defense. You’ve taken so long to tell us about your first discovery that I can’t wait to hear about the second.”

“Oh, yes, you can,” replied Cal. “It will save you a lot of trouble, and I can tell it in about half a dozen words.”

“Go ahead and tell it, then.”

“It is simply that I have solved the whole problem of defense.”

“How? Tell us about it!”

“Why, just above our camp—up the creek a few hundred yards, there’s a big gum tree, with an easily accessible crotch, comfortable to sit in, from which the one playing sentinel can see everything we want to see. He can look clear across this point and half a mile or more up the creek, and by turning his head he can see the camp itself and the Hunkydory and even the soiled spots on your coats. All we’ve got to do is to keep a sentinel in that gum tree, and nobody can approach our camp unseen, whether he comes by land or by water. Come on and I’ll show you.”

The whole company followed Cal, and after a minute inspection found the lookout to be quite as satisfactory as he had represented it to be. But Tom, who had made up his mind to acquire Cal’s habit of observation, noticed some things about the place that aroused his curiosity. He said nothing about them at the time, but resolved to read the riddle of their meaning if he could. To that end he asked to be the first to serve as sentinel.

“All right,” said Larry. “You can stay here till we’re ready to go after that deer. Then I’ll take your place.”

“But why?”