“Well, sir, a minute or two after Mr. Greve had passed me, I went back to the hall and through the open door of the corridor leading to the library, I heard voices!”
“Voices, eh? Did you recognize them?”
“No, sir. It was just the sound of talking!”
“You told Miss Trevert they were loud voices, Bude!” Robin interrupted.
“Yes, sir,” replied the butler, “they were loudish in a manner o’ speaking, else I shouldn’t have heard them!”
“Why not?”
The detective rapped the question out sharply.
“Why, because the library door was locked, sir!”
“How do you know that?”
“Because Miss Trevert and Dr. Romain both tried the handle and couldn’t get in!”