All the letter-trays save one were empty. In this was a little heap of papers and letters. Robin glanced through them. There were two or three prospectuses, a notice of a golf match, a couple of notes from West End tradesmen enclosing receipts and an acknowledgement from the bank. There was only one personal letter—a business communication from a Rotterdam firm. Robin glanced at the letter. It was typewritten on paper of a dark slatey-blue shade. It was headed, “ELIAS VAN DER SPYCK & Co., GENERAL IMPORTERS, ROTTERDAM,” and dealt with steel shipments. Robin dropped the letter back into the tray and turned to survey the room. It was in perfect order. Except for the still form lying on the floor and the broken pane of glass in the window, there was nothing to tell of the tragedy which had been enacted there that afternoon. There were no papers to hint at a crisis save the prosaic-looking envelope containing the will, and Parrish’s note for Mary. The waste-paper basket, a large and business-like affair in white wicker, had been cleared. Robin walked across to the fireplace. The flames leapt eagerly about a great oak log which hissed fitfully on top of the glowing coals contained in the big iron fire-basket. The grate was bare and tidy. As the young man looked at the fire, a little whirl of blue smoke whisked out of the wide fireplace and eddied into the room. Robin sniffed. The room smelt smoky. Now he remembered he had noticed it as he came in. He stood an instant gazing thoughtfully at the blazing and leaping fire. He threw a quick glance at the window where the curtains tossed fitfully in the breeze coming through the broken pane. Suddenly he stepped quickly across the room and, lifting the reading-lamp from the table, bore it over to the window which he scrutinized narrowly by its light. Then he dropped on one knee beside the dead body, placing the lamp on the floor beside him. He lifted the dead man’s left hand and narrowly examined the nails. Without touching the right hand which clasped the revolver, he studied its nails too. He rose and took the gold-mounted reading-glass from the desk and scrutinized the nails of both hands through the glass. Then he rose to his feet again and, having replaced lamp and reading-glass on the desk, stood there thoughtfully, his brown hands clasped before him. His eyes wandered from the desk to the window and from the window to the corpse. Then he noticed on the carpet between the dead body and the desk a little ball of slatey-blue paper. He bent down and picked it up. He had begun to unroll it when the library door was flung open. Robin thrust the scrap of paper in his pocket and turned to face the door. CHAPTER V. IN WHICH BUDE LOOKS AT ROBIN GREVE