"Do you know----?" He was at the door when she spoke and he stopped and turned. "The name of Mr. Scobbs gives me a cold shiver." "Why?" "Answer me this," she said: "why should I who have never heard of him before until yesterday hear his name mentioned by a perfect stranger?" The smile died away from his face. "Who mentioned him! No, it isn't idle curiosity," he said in face of her derisive finger. "I am really serious. Who mentioned his name?" "A visitor of Doctor van Heerden's. I heard them talking through the ventilator when I was bolting my door." "A visitor to Doctor van Heerden, and he mentioned Mr. Scobbs of Red Horse Valley," he said half to himself. "You didn't see the man?" "No." "You just heard him. No names were mentioned?" "None," she said. "Is it a frightfully important matter?" "It is rather," he replied. "We have got to get busy," and with this cryptic remark he left her. The day passed as quickly as its predecessor. The tabulation at which she was working grew until by the evening there was a pile of sheets in the left-hand cupboard covered with her fine writing. She might have done more but for the search she had to make for a missing report to verify one of her facts. It was not on the shelf, and she was about to abandon her search and postpone the confirmation till she saw Beale, when she noticed a cupboard beneath the shelves. It was unlocked and she opened it and found, as she had expected, that it was full of books, amongst which was the missing documentation she sought. With a view to future contingencies, she examined the contents of the cupboard and was arrested by a thin volume which bore no inscription or title on its blank cover. She opened it, and on the title page read: "The Millinborn Murder." The author's name was not given and the contents were made up of very careful analysis of evidence given by the various witnesses at the inquest, and plans and diagrams with little red crosses to show where every actor in that tragedy had been. She read the first page idly and turned it. She was half-way down the second page when she uttered a little exclamation, for a familiar name was there, the name of Dr. van Heerden. Fascinated, she read the story to the end, half-expecting that the name of Mr. Beale would occur.