“Adam’s off ox?” drawled Herc easily.
“No, you chump—Gradbarr.”
“Gradbarr! You’re crazy.”
“I’m certain it was he. That beard was a disguise. This looks as if it might be one of his tricks. If it is, Mr. Lockyer’s in about as bad a fix as he can be.”
Herc was fairly alive now. He literally crackled with animation.
“Let’s get after them and make sure,” he urged. “If it is Gradbarr, or any one like him, we ought to warn Mr. Lockyer at once.”
“Of course,” said Ned impatiently; “but how——”
“How? Row after them, of course.”
“A fine idea, Herc, but submarines don’t carry boats.”
“Turbines and tamborines, that’s so. Then what in the name of the big bow gun are we going to do?”