“No, there are no duplicates.”
“Have the keys ever gone out of your possession?”
“Yes. If I have had to be absent from the office for a considerable time, it has been my custom to hand the keys to one of my nephews, whichever has happened to be in charge at the time.”
“And never to any other person?”
“Never to any other person.”
“What did you observe when you opened the safe?”
“I observed that the parcel of diamonds had disappeared.”
“Did you notice anything else?”
“Yes. I found the leaf from my memorandum block lying at the bottom of the safe. I picked it up and turned it over, and then saw that there were smears of blood on it and what looked like the print of a thumb in blood. The thumb-mark was on the under-surface, as the paper lay at the bottom of the safe.”
“What did you do
