"None except that all were prominent men and all of them mental workers of high caliber. That didn't appear peculiar because it is the man of high mentality who is most apt to crack."
"Undoubtedly. There were some points of similarity which you missed. Where did the attacks take place?"
"Why, one was at—Thunder, Doctor! I did miss something. Every case, as nearly as I can recall, happened at some summer camp or other resort where they were on vacation."
"Correct. One other point. At what time of day did they occur?"
"In the morning, as well as I can remember. That point didn't register."
"They were all discovered in the morning, Carnes, which means that the actual loss of memory occurred during the night. Further, every case has happened within a circle with a diameter of three hundred miles. We are near the northern edge of that circle."
arnes checked up on his memory rapidly.
"You're right, Doctor," he cried. "Do you think—?"