When Kemp read this letter twice, “It’s no hoax,” he said. “That’s his voice! And he means it.”

He turned the folded sheet over and saw on the addressed side of it the postmark Hintondean , and the prosaic detail “2 d. to pay.”

He got up slowly, leaving his lunch unfinished⁠—the letter had come by the one o’clock post⁠—and went into his study. He rang for his housekeeper, and told her to go round the house at once, examine all the fastenings of the windows, and close all the shutters. He closed the shutters of his study himself. From a locked drawer in his bedroom he took a little revolver, examined it carefully, and put it into the pocket of his lounge jacket. He wrote a number of brief notes, one to Colonel Adye, gave them to his servant to take, with explicit instructions as to her way of leaving the house. “There is no danger,” he said, and added a mental reservation, “to you.” He remained meditative for a space after doing this, and then returned to his cooling lunch.