"I will call and see you again," he said, "but meanwhile give me Lord Calliston's address in Piccadilly and I will find out if Miss Sarschine was at his rooms on that night."
Lydia Fenny, who was now crying, gave the necessary address and followed him to the door.
"One moment," said Dowker, stopping. "Where is the dagger that used to be on the wall?"
Lydia looked round for the weapons and gave a cry of astonishment.
"Two are gone."
"I have the one, but the other--where is it?"
"Miss Sarschine took it down on Monday, and said if Calliston did not take her with him she'd kill him."
"Kill him--not herself?"
"No, she had no idea of committing suicide. What are you going to do with the other?"
"Try it on a dog, and find out if the symptoms of death are the same, then I will know the companion dagger to this was the cause of your mistress's death."