"Yes. I am the lecturer on Medical Jurisprudence and Toxicology."
"Have you had much experience of medico-legal inquiries?"
"A great deal. I am engaged exclusively in medico-legal work."
"You heard the evidence relating to the two drops of blood found in the safe?"
"I did."
"What is your opinion as to the condition of that blood?"
"I should say there is no doubt that it had been artificially treated—probably by defibrination."
"Can you suggest any explanation of the condition of that blood?"
"I can."
"Is your explanation connected with any peculiarities in the thumb-print on the paper that was found in the safe?"