That one keen note may have been some strange water sound produced far down in the bowels of the earth.

It may have been that or it may have been that sinister bell of which I had heard so much.

Be this as it may, it was the only sign that rose to us from the last terrible resting-place of the two who had paid the debt which had so long been owing.
We joined our voices in a call with the unreasoning obstinacy with which men will cling to hope, but no answer came back to us save a hollow moaning from the depths beneath.

Footsore and heart-sick, we retraced our steps and climbed the slimy slope once more.
"What shall we do, Mordaunt ?" I asked, in a subdued voice.

"We can but pray that their souls may rest in peace." Young Heatherstone looked at me with flashing eyes.
"This may be all according to occult laws," he cried, "but we shall see what the laws of England have to say upon it.