“Let us begin,” continued Worrals, “with the entry of the hook-nosed Arab into our room at the hospital. Did you notice the first place he made for?”
“The dressing-table.”
“Quite right. We know from his own lips that he covets the necklace, so we needn’t ask what he was looking for. That is perfectly straightforward, but now tell me this. As he went straight to the dressing-table, he must have known the necklace was there—as it would have been had I not removed it just before he came in. How did he know that?”
“Ah-huh. Unless he’s a thought-reader someone must have told him.”
“Correct. Forget the thought-reader angle. It doesn’t exist. Someone told him. Who told him? Obviously someone who knew it was there. How many people knew that? Put it this way—how many people had been in our room
