They both laughed at the idea, and then Rupert lighted the match. It was distinctly nervous work however, and Olivia started back, as her husband set the joss-stick fizzling. She was leaning forward in the chair with her dark head nearly touching his fair hair. The joss-stick smoked slowly and a queer odour diffused itself though the room. Olivia sniffed. "Rupert," she said positively, "it's the same scent as was on that letter of Tung-yu's." "And of Lo-Keong also," said Rupert watching the thick bluish smoke, which now began to curl up from the joss-stick, "apparently the Mandarin uses the perfume as a kind of clue, or perhaps it is a special scent dedicated to this private god of his. I shall never understand Chinamen and I'm very sure I don't want too. Olivia, hold the stick while I wave the fan in the smoke." Being now assured that the smoke was proceeding from a harmless article, Mrs. Ainsleigh took the stick and held it lightly, while her husband gravely waved the out-spread fan in the thick smoke. The joss-stick fizzled and burned and gave out its queer smell, which made both slightly dizzy. Every now and then, Rupert looked at the enamelled side of the fan, where Tung-yu said that a picture would appear. There certainly did seem something scrawled on the smooth green sticks, and a blurred outline revealed itself. For quite ten minutes Ainsleigh continued waving, until the joss-stick burnt down nearly to the root. Then he looked again, Olivia placed the still fizzling joss-stick in the fender, and peered over his shoulder. She uttered a cry when she saw the black outline of the picture, and Rupert nearly echoed it. They were looking at a drawing of the cloisters. Yes--there were the cloisters of Royabay Abbey taken, as by a camera, from the archway. The architecture was clear enough, and the trees also. But the picture was merely evanescent, for as the fan grew cold again the outlines vanished. However, they knew that the hiding place of the presumed papers, was within the cloisters of Royabay--but in what spot. Rupert laid down the fan and propounded the problem to his wife. "The indications would be more exact." "Yes," replied Olivia thoughtfully, and picked up the fan, "I suppose you are right, Rupert. It must have been Hwei who came to the Abbey on the night my aunt was killed and dropped the joss-stick. Perhaps he came to see if he could find the hiding place, without the aid of the fan." "No," said Rupert, "Hwei is the servant of Lo-Keong, and probably knew of the hiding place; whereas Tung-yu, who served Hop Sing wanted the fan to learn about it. I expect had Tung-yu bought the fan, he would have come here and found the papers and then have cleared out to China to place them in his master's hands and ruin Lo-Keong." "Are you sure there are papers hidden?" said Olivia, fingering the beads dangling from the thick yellow cord.