He led the way through the house to the room where the tragedy had occurred Mr. Paynter's study. It was a wide, low room, with book-lined walls and big leather arm chairs.
Poirot looked across at once to the window, which gave upon a gravelled terrace.
“The window, it was unlatched?” he asked.
“That 's the whole point of course. When the .doctor left this room, he merely closed the door behind him. The next morning, it was found locked. Who locked it Mr. Paynter? Ah Ling declares that the window was closed and bolted. Dr. Quentin, on the other hand, has an impression that it was closed, but not fastened but he won't swear either way. If he could, it would make a great difference. If the man was murdered, someone entered the room either through the door or the window. If through the door
