"The noise--I mean I know where it comes from," cried the excited
boy.

"Where?" chorused Ben and Harry.

"From somewhere about the Upturned Face," cried Frank triumphantly,
"Hark!"

The strange wailing cry rang out once more. They all listened
intently.

Sure enough it seemed to proceed from the sinister countenance
carved in the living rock above them.

"Well, here's where we end this mystery for all time," shouted
Frank, drawing his revolver, "who is game to follow me?"

Of course Harry and Ben rushed to his side, and while the echo of
the mysterious cry was still sobbing and sighing among the crags
they dashed back up the mountain-side utterly oblivious now to the
heat or anything but their determination to discover who or what had
uttered the extraordinary cry. The side of the nose--or the nostril
so to speak--was formed of a wall of rock fully twelve feet in
height.

"You fellows give me a boost up there and I'll travel right along
the face till I find out where the racket comes from."

On Ben's strong shoulders Frank was soon hoisted up to a height