"Suppose, whoever made that path, had pulled over his shoes a heavy woolen sock." He nodded.

"I feel, somehow, that the Hun flattened out those leaves," she went on. "I am sure that had an American made the trail he would also have contrived to let us know--given us some indication of his ident.i.ty."

The girl's low voice suddenly failed and her hand clutched McKay's shoulder.

They lay among the alpine roses like two stones, never stirring, the dappled sunlight falling over them as harmoniously and with no more and no less accent than it spotted tree-trunk and rock and moss around them.

And, as they lay there, motionless, her head resting on his thigh, a man came out of the dimmer woods into the white sunshine that flooded the verge of the granite chasm.

The man was very much weather-beaten; his tweeds were torn; he carried a rifle in his right hand. And his left was bound in b.l.o.o.d.y rags. But what instantly arrested McKay's attention was the pack strapped to his back and supported by a "tump-line."

Never before had McKay seen such a pack carried in such a manner excepting only in American forests.

The man stood facing the sun. His visage was burnt brick colour, a hue which seemed to accentuate the intense blue of his eyes and make his light-coloured hair seem almost white.

He appeared to be a man of thirty, superbly built, with a light, springy step, despite his ragged and weary appearance.

McKay's eyes were fastened desperately upon him, upon the strap of the Indian basket which crossed his sun-scorched forehead, upon his crystal-blue eyes of a hunter, upon his wounded left hand, upon the sinewy red fist that grasped a rifle, the make of which McKay should have known, and did know. For it was a Winchester 45-70--no chance for mistaking that typical American weapon. And McKay fell a-trembling in every limb.

Presently the man cautiously turned, scanned his back trail with that slow-stirrng wariness of a woodsman who never moves abruptly or without good reason; then he went back a little way, making no sound on the forest floor.

AND MCKAY SAW THAT HE WORE KNEE MOCCASINS.

At the same time Evelyn Erith drew her little length noiselessly along his, and he felt her mouth warm against his ear:

"Gray?" He nodded.

"I think so, too. His left hand is injured. He wears American moccasins. But in G.o.d's name be careful, Kay. It may be a trap."

He nodded almost imperceptibly, keeping his eyes on the figure which now stood within the shade of the trees in an att.i.tude which might suggest listening, or perhaps merely a posture of alert repose.

Evelyn's mouth still rested against his ear and her light breath fell warmly on him. Then presently her lips moved again:

"Kay! He LOOKS safe."

McKay turned his head with infinite caution and she inclined hers to his lips:

"I think it is Gray. But we've got to be certain, Eve." She nodded.

"He does look right," whispered McKay. "No Boche cradles a rifle in the hollow of his left arm so naturally. It is HABIT, because he does it in spite of a crippled left hand."

She nodded again.

"Also," whispered McKay, "everything else about him is convincing--the pack, tump-line, moccasins, Winchester: and his manner of moving.... I know deer-stalkers in Scotland and in the Alps. I know the hunters of ibex and chamois, of roe-deer and red stag, of auerhahn and eagle. This man is DIFFERENT. He moves and behaves like our own woodsmen--like one of our own hunters."

She asked with dumb lips touching his ear: "Shall we chance it?"

"No. It must be a certainty."

"Yes. We must not offer him a chance."

"Not a ghost of a chance to do us harm," nodded McKay. "Listen attentively, Eve; when he moves on, rise when I do; take the pigeon and the little sack because I want both hands free. Do you understand, dear?"

"Yes."

"Because I shall have to kill him if the faintest hint of suspicion arises in my mind. It's got to be that way, Eve."

"Yes, I know."

"Not for our own safety, but for what our safety involves," he added.

She inclined her head in acquiescence.

Very slowly and with infinite caution McKay drew from their holsters beneath his armpits two automatic pistols.

"Help me, Eve," he whispered.

So she aided him where he lay beside her to slip the pack straps over his shoulders. Then she drew toward her the little osier cage in which their only remaining carrier-pigeon rested secured by elastic bands, grasped the smaller sack with the other hand, and waited.

They had waited an hour and more; and the figure of the stranger had moved only once--shifted merely to adjust itself against a supporting tree-trunk and slip the tump-line.

But now the man was stirring again, cautiously resuming the forehead-straps.

Ready, now, to proceed in whichever direction he might believe lay his destination, the strange man took the rifle into the hollow of his left arm once more, remained absolutely motionless for five full minutes, then, stirring stealthily, his moccasins making no sound, he moved into the forest in a half-crouching att.i.tude.

And after him went McKay with Evelyn Erith at his elbow, his sinister pistols poised, his eyes fixed on the figure which pa.s.sed like a shadow through the dim forest light ahead.

Toward mid-afternoon their opportunity approached; for here was the first water they had encountered--and the afternoon had become burning hot--and their own throats were cracking with that fierce thirst of high places where, even in the summer air, there is that thirst-provoking hint of ice and snow.

For a moment, however, McKay feared that the man meant to go on, leaving the thin, icy rivulet untasted among its rocks and mosses; for he crossed the course of the little stream at right angles, leaping lithely from one rock to the next and travelling upstream on the farther bank.

Then suddenly he stopped stock-still and looked back along his trail--nearly blind save for a few patches of flattened dead leaves which his moccasined tread had patted smooth in the shadier stretches where moisture lingered undried by the searching rays of the sun.

For a few moments the unknown man searched his own back-trail, standing as motionless as the trunk of a lichened beech-tree. Then, very slowly, he knelt on the dead leaves, let go his pack, and, keeping his rifle in his right hand, stretched out his sinewy length above the pool on the edge of which he had halted.

Twice, before drinking, he lifted his head to sweep the woods around him, his parched lips still dry. Then, with the abruptness--not of man but of some wild thing--he plunged his sweating face into the pool.

And McKay covered him where he lay, and spoke in a voice which stiffened the drinking man to a statue p.r.o.ne on its face:

"I've got you right! Don't lift your head! You'll understand me if you're American!"

The man lay as though dead. McKay came nearer; Evelyn Erith was at his elbow.

"Take his rifle, Eve."

The girl walked over and coolly picked up the Winchester.

"Now cover him!" continued McKay. "Find a good rest for your gun and keep him covered, Eve."