have that
treasure."

They quickened their steps now. This was no time for leisurely
investigation of the phenomena of earthquakes. They soon reached the
point they had attained the day before. But as they had explored that
section of the hillside already, they did not halt there, but pushed on
to the west.

"Now," said the captain, as he and Drew disburdened themselves of the
spades and mattocks they had brought along, carefully wrapped under the
guise of surveyors instruments, "we'll go at this thing in a scientific
way. We'll make a rough division of this whole section"--he included
with a wave of his hand a space half a mile square--"into four parts.
No, three parts. Tyke must rest his leg. Then each must search his
section to find some rocks that look like those beauties marked on the
map."

The three scattered promptly, and began the search. They looked
diligently, but for a long time found nothing to reward their efforts.
Drew tried as conscientiously as the rest, although at times he could
not make his eyes behave, and his gaze would wander over in Ruth's
direction. It was in one of these lapses from industry that he saw her
lift her arm and wave eagerly in his direction. He did not wait for a
second summons, but hurried over, after calling to the others to follow.

The girl was flushed and excited.

"What have you found?" Drew asked, as soon as he got within speaking
distance.

"Look!" she answered. "Doesn't that big rock over there seem to you
like a witch's head--wild and ragged locks, and all that?"

From where he was then standing, he could trace no resemblance, but
when he reached her side and looked from the same angle he raised a
shout.

"The very thing!" he cried. "There can't be any doubt of it."

The rock in question stood apart from the rest on the slope of the
hill. Nature had carved it in a moment of prankishness. There were
all the features of an old crone, forehead, nose, sunken mouth,
nut-cracker jaws, while small streams of lava, hardening as they had
flowed, gave the similitude of scanty tresses.

Tyke and the captain, soon came up, and all their doubts disappeared as
they gazed.

"The Witch's Head!" they agreed exultantly.

"With that to start with, the rest will be easy," cried Drew. "The
Three Sisters can't be more than a few hundred feet or so away."

Ten minutes' further search revealed a group of three rocks, which,
while having no resemblance to female f