"I'm Afraid It Is an Octopus!"

"Can you do it, lad? Yes, I've a brand-new outfit aboard that's of the latest type. But what'll I say to your father if anything happens to you?"

"Dad wouldn't want me to stand back at a time like this," rejoined the young inventor. "I sent these men down and it's up to me to see they get back safely!"

"But, Tom!" cried Ned. "What of the octopus? You may be trapped too, and not save Manuel and Alvarez either!"

"It's up to Me!"

"You forget, or maybe you didn't know, that I brought my electric rifle with me. That'll polish off any devil-fish I'm likely to meet!"

"Well, at least let me go too!"

"Isn't but one suit," said Captain Britten. "Now, Tom Swift, if you're ready, here's the suit."

"All set," said the young inventor calmly. He began to remove his outer clothing. "Ned, please bring up my rifle."