Then Evelyn Erith, rising cautiously to her scarred knees, saw the signaller gather up his flags and step into what apparently was the bed of the bowlder on the edge of the windfall. But it was deeper than that, for he descended to his knees, to his waist, his shoulders; and then his head disappeared into some hole which she could not see.
Now the officer who had remained, calmly smoking his cigarette, flung the remains of it over the cliff, turned, surveyed the forest behind him with minute deliberation, then stepped into the excavation down which the signaller had disappeared.
Some instinct kept the girl motionless after the man's head had vanished; minute after minute passed, and Evelyn Erith never stirred. And suddenly the officer's head and shoulders popped up from the hole and he peered back at the forest like an alarmed marmot. And the girl saw his hands resting on the edge of the hole; and the hands grasped two pistols.
Presently, apparently reassured and convinced that nobody was attempting to follow him, he slowly sank out of sight once more.
The girl waited; and while waiting she cut a long white sliver from the beech-tree and carved an arrow pointing toward the heap of debris. Then, with the keen tip of her trench-knife she scratched on the silvery bark:
"An underground way in the windfall. I have followed them.
Yellow-hair."
She crept stealthily out into the sunshine through the vast abatis of the fallen trees and came to the edge of the hole. Looking down fearfully she realised at once that this was the dry, rocky stairs of some subterranean watercourse through which, in springtime, great fields of melting snow poured in torrents down the face of the precipice below.
There were no loose stones to be seen; the rocky escalier had been swept clean unnumbered ages since; but the rocks were fearfully slippery, shining with a vitreous polish where the torrents of many thousand years had worn them smooth.
And this was what they called the Via Mala!—this unsuspected and secret underground way that led, God knew how, into the terrific depths below.
There was another Via Mala: she had seen it from Mount Terrible; but it was a mountain path trodden not infrequently. This Via Mala, however, wormed its way downward into shadows. Where it led and by what perilous ways she could only imagine. And were these men perhaps, lying in ambush for her somewhere below—on the chance that they might have been seen and followed?