invisible mystic signs, so that she was able to see and
do many wonderful things.

The acacia tree was on top of a high bluff, but a
path ran down the bank in a zigzag way to the water's
edge, where Cap'n Bill's boat was moored to a rock
by means of a stout cable. It had been a hot, sultry
afternoon, with scarcely a breath of air stirring, so
Cap'n Bill and Trot had been quietly sitting beneath
the shade of the tree, waiting for the sun to get low
enough for them to take a row.

They had decided to visit one of the great caves
which the waves had washed out of the rocky coast
during many years of steady effort. The caves were
a source of continual delight to both the girl and the
sailor, who loved to explore their awesome depths.

"I b'lieve, Cap'n," remarked Trot, at last, "that
it's time for us to start."

The old man cast a shrewd glance at the sky, the
sea and the motionless boat. Then he shook his head.

"Mebbe it's time, Trot," he answered, "but I don't
jes' like the looks o' things this afternoon."

"What's wrong?" she asked wonderingly.

"Can't say as to that. Things is too quiet to suit