Sure enough, the two divers were seen rapidly approaching the Dart.
“Mercy!” exclaimed Frank, with a deep breath. “I am thankful for that. I had given them up for lost.”
But even as he spoke he gave a great shout of alarm.
Behind the two men there suddenly appeared a giant form.
Frank saw that it was an octopus. Its long tentacles were ready to grasp them. It was a moment of fearful peril.
Barney rushed to the observation window, screaming and waving his arms wildly.
“Look out wid yez!” he shouted. “Shure, don’t yez see phwat’s behind yez?”
Of course the two men did not hear these words, but they saw Barney’s actions and at once understood.
They turned quickly, but it was too late.
Von Bulow was instantly encircled by a tentacle. Captain Bell was just quick enough to avoid one.