“Yes. Where I cut open the envelope—”
“Wait a moment. You say you cut it open. All these, being one-cent postage, must have come unsealed. Was the first different?”
“Yes. It had a two-cent stamp. It was a circular announcement of the Swift-Reading Encyclopedia, in a sealed envelope. There was a pin bent over the fold of the letter so you couldn’t help but notice it. Its head was stuck through the blank part of the circular. Leading from it were three very small pins arranged as a pointer to the message.”
“Do you remember the message?”
“Could I forget it! It was pricked out quite small on the blank fold of the paper. It said: ‘Make the most of your freedom. Your time is short. Call at General Delivery, Main P. O., for your warning.’ I—”
“You went there?”
“The next day.”
“And found—?”
“An ordinary sealed envelope, addressed in pinpricks connected by pencil lines. The address was scrawly, but quite plain.”
“Well, what did it contain?”