The ex-colonel pulled himself up short, and glanced anxiously at the faces of his companions. Had either of them seen? He noticed a look of horror and strong repugnance upon the faces of all three; but the horror was the kind that raises from the sight of some dreadful object, not the kind that is aroused upon witnessing some especially dreadful occurrence. He waited a moment to give one or another of them an opportunity to speak. He hoped they had _not_ seen. He himself had only caught the barest momentary glimpse, as the creature shot suddenly up out of the body of the wreck, before it turned; but that glimpse was enough: _he had seen_! "Oh, what a dreadful creature!" exclaimed Lady Olivia, turning a pale face to Lethbridge. "What is it, Colonel, and where did it come from?" Evidently _she_ had not seen! "It is an octopus, or giant squid, as some people call it. It is very similar to the ordinary cuttlefish, only, of course very 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."