"I am as sane as you are!" continued Ben, hotly.
"Well, well, I may be a little touched myself—who knows?" said M. Bourdon, or the doctor, as we may call him, in a tone of banter.
It was hard for Ben to restrain himself, so impressed was he by the outrage of which he was the victim. It would have been a relief to attack the doctor, and seek deliverance by forcible means, but a glance at the well-knit frame of M. Bourdon, and the certainty of his being able to summon assistance, deterred him and led him to control his rash impulse. One thing he could do, and that was to ascertain, if possible, Major Grafton's motive in subjecting him to imprisonment.
"What proof have you that I am insane?" he asked, more calmly.
"Your appearance."
"You have not had time to examine me."
"The doctors are able to judge from very slight examination," said M. Bourdon, smiling.
"Did Major Grafton tell you I was insane?" asked Ben.
"You mean the gentleman who came here with you?"
"Yes."