much larger.
And, so far as I could see, it appeared to spring from the hull of the
wreck. If you will excuse me for a moment, ladies, I will go to the
pilot-house and endeavour to give our friends yonder some intimation of
its presence; the professor will be interested to know that a genuine
giant squid is within a few yards of him."

And thus lightly speaking, Lethbridge sauntered quietly out of the
saloon, closed the door carefully behind him, and dashed at break-neck
speed for the pilot-house.

He had already made up his mind what to do, and doubtless those other
fellows would understand; they were quick-witted enough, surely, to
grasp the meaning of such an action on his part.

His thoughts had reached thus far when he arrived in the pilot-house.
Grasping the switch-handle of the great electric lantern, he proceeded
to switch the light on and off rapidly, which act had the effect of
almost immediately attracting the attention of the three men who were
sitting on the skylight of the wreck. He saw them look at each other,
as though speaking, and then von Schalckenberg rose to his feet and
raised both hands above his head, to indicate that he was attending.
And, thereupon, Lethbridge immediately began to signal, in the Morse
code, by means of long and short flashes, the message--

"Mildmay in danger. Seized by octopus and carried into cave some
distance above your heads."

To this message the professor at once replied by waving his arms in
accordance with the "flag-waving" system used in the British navy and
army--

"Right. We go to his rescue. Guide us to the cave."

Lethbridge gave the flash that indicated his comprehension of the
communication, and then, with the switch-handle still in his hand,
intently watched, through one of the pilot-house windows, the movements
of the three. He saw them lower themselves down on to the sand, and
immediately begin to climb up the rugged side of the reef. The surface
of the rocks was slippery with weed, and their progress was, therefore,
painfully slow; but at length they reached a point above and clear of
the wreck, and von Schalckenberg then turned and faced the pilot-house,
evidently asking for guidance.

"Go higher and bear to your right," signalled Lethbridge; and the men
resumed their climb.

They were now making directly for the spot at which the octopus had
disappeared, and a _few_ minutes later they reached a ledge, with the
cave immediately in front o