“Then you are Dr Robson, sir?” he said.

“Yes. May I ask—”

“You are here carrying out a scientific research?”

“Yes.”

“In company with your consort, Count Des Saix, of the French brig Dagobert?”

“That’s quite right, sir; but may I ask—”

“Why you are my prisoners? Certainly. But I will shorten matters by telling you that your scientific research was a plot to carry off the prisoner of the British Government, the ex-emperor Napoleon Bonaparte.”

“No, sir, I’ll be hanged if it was!” cried the doctor.

“Which plot has completely failed,” added the captain. “As I have said, sir, you are my prisoner.”

“And what about Captain Chubb, here, and my nephew?”