"And now what about the window? Was that open or shut or what?"
"Shut but not snibbed, sir."
Ned turned to Bisset.
"Did Sir Reginald ever forget to snib the windows, supposing one happened to be open?"
"Practically never, sir."
"Last thing before he left the room, I suppose?" said the lawyer.
The butler hesitated.
"I suppose so, sir," he admitted, "but of course I was never here to see."
"Exactly!" said Simon. "Therefore one can draw no conclusions as to whether the window had been standing all the time just as it is now, or whether it had been opened and shut again from the outside; seeing that Sir Reginald was presumably killed before his usual time for looking to the windows."