varied display of emotion.
She felt a sense of intrusion that was almost unjustifiable, even in a
detective. What right had anyone to spy upon a communion between God
and man?

He rose, at length, rose and walked uncertainly forward, stumbling
among the ragged rocks. He made for the far hillside that was cluttered
with huge fragments of stone, some weighing many tons and all tumbled
helter-skelter as if aimlessly tossed there by some giant hand. And
when he reached the place he threaded his way between several great
boulders and suddenly disappeared.

Josie hesitated a moment what to do, yet instinct urged her to follow.
She had a feeling that she was on the verge of an important discovery,
that events were about to happen which had been wholly unforeseen even
by old Cragg himself.

She was taking a serious risk by venturing on the stony ground, for
under the moonlight her dark form would show distinctly against the
dull gray of the stones. Yet she climbed the fence and with her eye
fixed on the cluster of rocks where Old Swallowtail had disappeared she
made her way as best she could toward the place. Should the old man
reappear or the owner of the strange automobile emerge from the rocks
Josie was sure to be discovered, and there was no telling what penalty
she might be obliged to pay for spying. It was a dreary, deserted
place; more than one grave might be made there without much chance of
detection.

In a few minutes she had reached the hillside and was among the great
boulders. She passed between the same ones where Mr. Cragg had
disappeared but found so many set here and there that to follow his
trail was impossible unless chance led her aright.

There were no paths, for a rubble of small stones covered the ground
everywhere. Between some of the huge rocks the passage was so narrow
she could scarcely squeeze through; between others there was ample
space for two people to walk abreast. The girl paused frequently to
listen, taking care the while to make no sound herself, but an intense
silence pervaded the place.

After wandering here and there for a time without result she had
started to return to the entrance of this labyrinth when her ears for
the first time caught a sound--a peculiar grinding, thumping sound that
came from beneath her feet seemingly, and was of so unusual a character
that she was puzzled to explain its cause.

The shadows cast by the towering rocks rendered this place quite dark,
so Jos