THE CRY OF A NIGHTHAWK Such were the episodes that marked the coming of Dr. Fu-Manchu to London, that awakened fears long dormant and reopened old wounds--nay, poured poison into them. I strove desperately, by close attention to my professional duties, to banish the very memory of Karamaneh from my mind; desperately, but how vainly! Peace was for me no more, joy was gone from the world, and only mockery remained as my portion. Poor Eltham we had placed in a nursing establishment, where his indescribable hurts could be properly tended; and his uncomplaining fortitude not infrequently made me thoroughly ashamed of myself. Needless to say, Smith had made such other arrangements as were necessary to safeguard the injured man, and these proved so successful that the malignant being whose plans they thwarted abandoned his designs upon the heroic clergyman and directed his attention elsewhere, as I must now proceed to relate. Dusk always brought with it a cloud of apprehension, for darkness must ever be the ally of crime; and it was one night, long after the clocks had struck the mystic hour, "when churchyards yawn," that the hand of Dr. Fu-Manchu again stretched out to grasp a victim. I was dismissing a chance patient. "Good night, Dr. Petrie," he said. "Good night, Mr. Forsyth," I replied; and having conducted my late visitor to the door, I closed and bolted it, switched off the light, and went upstairs. My patient was chief officer of one of the P. and O. boats. He had cut his hand rather badly on the homeward run, and signs of poisoning having developed, had called to have the wound treated, apologizing for troubling me at so late an hour, but explaining that he had only just come from the docks. The hall clock announced the hour of one as I ascended the stairs. I found myself wondering what there was in Mr. Forsyth's appearance which excited some vague and elusive memory. Coming to the top floor, I opened the door of a front bedroom and was surprised to find the interior in darkness. "Smith!" I called. "Come here and watch!" was the terse response. Nayland Smith was sitting in the dark at the open window and peering out across the common. Even as I saw him, a dim silhouette, I could detect that tensity in his attitude which told of high-strung nerves. I joined him. "What is it?" I asked curiously. "I don't know. Watch that clump of elms." His masterful voice had the dry tone in it betokening excitement. I leaned on the ledge beside him and looked out. The blaze of stars almost compensated for the absence of the moon, and the night had a quality of stillness that made for awe. This was a tropical summer, and the common, with its dancing lights dotted irregularly about it, had an unfamiliar look to-night. The clump of nine elms showed as a dense and irregular mass, lacking detail.