“You are right, Jack. But I still don’t see what your hunch is.”

“Let’s just wait and see. I don’t know exactly what it is myself yet. I can only make a wild guess. Let’s go into the room.”

They entered and closed the door behind them. They had no use for their flashlights because the room had a window in each corner wall, and it was now early morning, about ten o’clock. “Notice another thing,” remarked Jack. “The windows—they are all in perfect shape.”

“That’s right, but that is nothing extraordinary. It is possible that the last tenant had moved out only recently.”

“Well, that doesn’t matter so much. Shall we first thoroughly go over the walls or the floor?”

Paul looked about for several seconds before he answered. “I think we had better do the floor first.” They looked down. “You know,” continued Paul, “I am somehow beginning to get a hunch like you have. I can’t exactly explain it, but—”

Jack interrupted, crying enthusiastically, “Do you really mean that? Because then—”

Paul held up a finger to his lips and cautioned, “Sh! Not so loud. Walls have ears, you know, and all that.” Both of them crouched down. “Do you notice something odd about the dust on the floor?” he asked.

“Yes,” replied Jack. “I noticed it the first time we were here but I forgot to mention it. There seems to be very little dust on this floor compared to the other rooms.”