picture of the last supper

picture of the last supper
It seems clear to you, then, Monsieur, that the murderer escaped - nobody knows how - by the window in the vestibule?"
"Everything goes to prove it."
"I think so, too," confessed Rouletabille gravely.
After a brief silence, he continued:
"If you have not found any traces of the murderer in the attic, such as the dirty footmarks similar to those on the floor of The Yellow Room, you must come to the conclusion that it was not he who stole Daddy Jacques's revolver."
"There are no footmarks in the attic other than those of Daddy Jacques himself," said the magistrate with a significant tum of his head. Then, after an apparent decision, he added: "Daddy Jacques was with Monsieur Stangerson in the laboratory - and it was lucky for him he was."