"You see it was this way," said Roscoe after hie had scrambled with amazing agility up to his "perch" in a tree several hundred feet distant but in full view of the stream. Tom had climbed up after him and was looking with curious pleasure at the little kit of rations and other personal paraphernalia which hung from neighboring branches. "How do you like my private camp? Got Temple Camp beat, hey?" he broke off in that erratic way of his. "All the comforts of home. Come on, get into your camouflage."

"You don't seem the same as when you used to come up to our office from the bank downstairs—that's one sure thing," said Tom, pulling the leaves about him.

"You thought all I was good for was to jolly Margaret Ellison, huh?"

"I see now that you didn't only save my life but lots of other fellers', too," said Tom. "Go on, you started to tell me about it."

It was very pleasant and cosy up there in the sniper's perch where Roscoe had gathered the thinner branches about him, forming a little leafy lair, in which his agile figure and his quick glances about reminded Tom for all the world of a squirrel. He could hardly believe that this watchful, dexterous creature, peering cautiously out of his romantic retreat, was the same Roscoe Bent who used to make fun of the scouts and sneak upstairs to smoke cigarettes in the Temple Camp office; who thought as much of his spotless high collar then as he seemed to think of his rifle now.

"I got to thank you because you named it after me," said Tom.

"And I got to thank you that you gave me the chance to get it to name after you, Tommy. Well, you see it was this way," Roscoe went on in a half whisper; "there were half a dozen of us over here in the woods and we'd just cleaned out a machine gun nest when we saw this miniature forest moving along. I thought it was a decorated moving van."

"That's the trouble with them," agreed Tom; "they're no good in the woods; they're clumsy. They're punk scouts."

"Scouts!" Roscoe chuckled. "If we had to fight this gang of cut-throats and murderers in the woods where old What's-his-name—Custer—had to fight the Indians, take it from me, we'd have them wiped up in a month. That fellow's idea of camouflaging was to bury himself under a couple of tons of green stuff and then move the whole business along like a clumsy old Zeppelin. I can camouflage myself with a branch with ten leaves on it by studying the light."

"Anybody can see you've learned something about scouting—that's one sure thing," said Tom proudly.

"One sure thing!" Roscoe laughed inaudibly. "It's the same old Tommy Slade. Well, I was just going to bean this geezer when my officer told me I'd better follow him."

"I was following him, too," said Tom; "stalking is the word you ought to use."

"Captain thought he might be up to something special. So I followed—stalked—how's that?"

"All right."

"So I stalked him and when I saw he was following the stream I made a detour and waited for him right here. You see what he was up to? Way down in Cantigny they could turn a switch and start this blamed poison, half a dozen hogsheads of it, flowing into the stream. They waited till they lost the town before they turned the switch, and they probably thought they could poison us Americans by wholesale. Maybe they had some reason to think the blamed thing hadn't worked, and sent this fellow up. I beaned him just as he was going to turn the stop-cock."

"Maybe you saved a whole lot of lives, hey?" said Tom proudly.

Roscoe shrugged his shoulder in that careless way he had. "I'll be glad to meet any more that come along," he said.

It was well that Tom Slade's first sight of deliberate killing was in connection with so despicable a proceeding as the wholesale poisoning of a stream. He could feel no pity for the man who, fleeing from those who fought cleanly and like men instead of beasts, had sought to pour this potent liquid of anguish and death into the running crystal water. Such acts, it seemed to him, were quite removed from the sphere of honorable, manly fighting.

As a scout he had learned that it was wrong even to bathe in a stream whence drinking water was obtained, and at camp he had always scrupulously observed this good rule. He felt that it was cowardly to defile the waters of a brook. It was not a "mailed fist" at all which could do such things, but a fist dripping with poison.

And Tom Slade felt no qualm, as otherwise he might have felt, at hiding there waiting for new victims. He was proud and thrilled to see his friend, secreted in his perch, keen-eyed and alert, guarding alone the crystal purity of this laughing, life-giving brook, as it hurried along its pebbly bed and tumbled in little gushing falls and wound cheerily around the rocks, bearing its grateful refreshment to the weary, thirsty boys who were holding the neighboring village.

"I used to think I wouldn't like to be a sniper," he said, "but now it seems different. I saw two fellers in the village and one had a bandage on his arm and the other one who was talking to him—I heard him say a long drink of water would go good—and—I—kind of—now——"

The Jersey Snipe winked at Tom and patted his rifle as a man might pat a favorite dog.

"It's good fresh water," said he.