As Tom had the balance of the day to himself he cherished but one thought—that of remaining with Roscoe as long as his leave would permit. If he had been in the woods up at Temple Camp, away back home in his beloved Catskills, he could hardly have felt more at home than he felt perched in this tree near the headwaters of the running stream; and to have Roscoe Bent crouching there beside him was more than his fondest dreams of doing his bit had pictured.

At short intervals they could hear firing, sometimes voices in the distance, and occasionally the boom of artillery, but except for these reminders of the fighting the scene was of that sort which Tom loved. It was there, while the sniper, all unseen, guarded the source of the stream, his keen eye alert for any stealthy approach, that Tom told him in hushed tones the story of his own experiences; how he had been a ship's boy on a transport, and had been taken aboard the German U-boat that had torpedoed her and held in a German prison camp, from which he and Archer had escaped and made their way through the Black Forest and across the Swiss border.

"Some kid!" commented Roscoe, admiringly; "the world ain't big enough for you, Tommy. If you were just back from Mars I don't believe you'd be excited about it."

"Why should I be?" said literal Tom. "It was only because the feller I was with was born lucky; he always said so."

"Oh, yes, of course," said Roscoe sarcastically. "I say he was mighty lucky to be with you. Feel like eating?"

It was delightful to Tom sitting there in their leafy concealment, waiting for any other hapless German emissaries who might come, bent on the murderous defilement of that crystal brook, and eating of the rations which Roscoe never failed to have with him.

"You're kind of like a pioneer," he said, "going off where there isn't anybody. They have to trust you to do what you think best a lot, I guess, don't they? A feller said they often hear you but they never see you. I saw you riding on one of the tanks, but I didn't know it was you. Funny, wasn't it?"

"I usually hook a ride. The tanks get on my nerves, though, they're so slow."

"You're like a squirrel," said Tom admiringly.

"Well, you're like a bulldog," said Roscoe. "Still got the same old scowl on your face, haven't you? So they kid you a lot, do they?"

"I don't mind it."

So they talked, in half whispers, always scanning the woods about them, until after some time their vigil was rewarded by the sight of three gray-coated, helmeted figures coming up the bank of the stream. They made no pretence of concealment, evidently believing themselves to be safe here in the forest. Roscoe had hauled the body of the dead German under the thick brush so that it might not furnish a warning to other visitors, and now he brought his rifle into position and touching his finger to his lips by way of caution he fixed his steady eye on the approaching trio.

One of these was a tremendous man and, from his uniform and arrogant bearing, evidently an officer. The other two were plain, ordinary "Fritzies." Tom believed that they had come to this spot by some circuitous route, bent upon the act which their comrade and the mechanism had failed to accomplish. He watched them in suspense, glancing occasionally at Roscoe.

The German officer evidently knew the ground for he went straight to the bush where the hogshead stood concealed, and beckoned to his two underlings. Tom, not daring to stir, looked expectantly at Roscoe, whose rifle was aimed and resting across a convenient branch before him. The sniper's intent profile was a study. Tom wondered why he did not fire. He saw one of the Boches approach the officer, who evidently would not deign to stoop, and kneel at the foot of the bush. Then the crisp, echoing report of Roscoe's rifle rang out, and on the instant the officer and the remaining soldier disappeared behind the leaf-covered hogshead. Tom was aware of the one German lying beside the bush, stark and motionless, and of Roscoe jerking his head and screwing up his mouth in a sort of spontaneous vexation. Then he looked suddenly at Tom and winked unmirthfully with a kind of worried annoyance.

"Think they can hit us from there? Think they know where we are?" Tom asked in the faintest whisper.

"'Tisn't that," Roscoe whispered back. "Look at that flat stone under the bush there. Shh! I couldn't get him in the right light before. Shh!"

Narrowing his eyes, Tom scanned the earth at the foot of the bush and was just able to discern a little band of black upon a gray stone there. It was evidently a wet spot on the dusty stone and for a second he thought it was blood; then the staggering truth dawned upon him that in shooting the Hun in the very act of letting loose the murderous liquid Roscoe had shot a hole in the hogshead and the potent poison was flowing out rapidly and down into the stream.

And just in that moment there flashed into Tom's mind the picture of that weary, perspiring boy in khaki down in captured Cantigny, who had mopped his forehead, saying, "A drink of water would go good now."