"Yes," said I rather dubiously; "there are plenty of others."

"The unusual size of these two," he went on, "and this being the scene of the tragedy led me to think that it would not be a bad idea to start the examination at this point. The great Boileau—and I learned this with not a little satisfaction, Bill, though I may say 'twas with no colossal surprise—the great Boileau did not give even the slightest attention to any crevasse. He knew before ever he came up here, of course, that the girl's death had been a purely accidental one.

"However, let us see what we are to find in this other fissure."

We found it even wider than the one which we had just quitted. And scarcely had we come to a pause there on the edge of it, and within a few yards of the rock, when I started and gave a low exclamation for silence.

For some moments we stood listening intently, but all was silent, save for the low, ghostly whisper of the mountain wind.

"What was it?" Rhodes asked in a low voice.

"I don't know. It may have been nothing, of course. But I certainly thought I heard something."

"Where?"

"I can't say. It seemed to come from out of the rock itself or—from this."

And I indicated the crevasse at our feet.