"Do you swear that the mark upon that paper was made by the thumb of the prisoner?"
"I do."
"Could it not have been made by the thumb of some other person?"
"No; it is impossible that it could have been made by any other person."
At this moment I felt Juliet lay a trembling hand on mine, and, glancing at her, I saw that she was deathly pale. I took her hand in mine and, pressing it gently, whispered to her, "Have courage; there is nothing unexpected in this."
"Thank you," she whispered in reply, with a faint smile; "I will try; but it is all so horribly unnerving."
"You consider," Sir Hector proceeded, "that the identity of this thumb-print admits of no doubt?"
"It admits of no doubt whatever," replied Mr. Singleton.
"Can you explain to us, without being too technical, how you have arrived at such complete certainty?"
"I myself took a print of the prisoner's thumb—having first obtained the prisoner's consent after warning him that the print would be used in evidence against him—and I compared that print with the mark on this paper. The comparison was made with the greatest care and by the most approved method, point by point and detail by detail, and the two prints were found to be identical in every respect.