"Well, I can see you have serious doubts about the man, as I have myself, so I can unburden my mind. You recall that sudden thunderstorm on Thursday?" "Rather; quite upset me for work." "I was out in it. I was lying in a punt in the backwater--you know, _our_ backwater." "Lazy dog." "To tell you the truth, I was trying to make up my mind whether I should abandon bones and take the post on the _Planet_ which has been offered me." "Pills for the pen--Harley for Fleet? Did you decide?" "Not then; something happened which quite changed my line of reflection." The room was becoming cloudy with tobacco smoke. "It was delightfully still," Cairn resumed. "A water rat rose within a foot of me and a kingfisher was busy on a twig almost at my elbow. Twilight was just creeping along, and I could hear nothing but faint creakings of sculls from the river and sometimes the drip of a punt-pole. I thought the river seemed to become suddenly deserted; it grew quite abnormally quiet--and abnormally dark. But I was so deep in reflection that it never occurred to me to move. "Then the flotilla of swans came round the bend, with Apollo--you know Apollo, the king-swan?--at their head. By this time it had grown tremendously dark, but it never occurred to me to ask myself why. The swans, gliding along so noiselessly, might have been phantoms. A hush, a perfect hush, settled down. Sime, that hush was the prelude to a strange thing--an unholy thing!" Cairn rose excitedly and strode across to the table, kicking the skull out of his way. "It was the storm gathering," snapped Sime. "It was something else gathering! Listen! It got yet darker, but for some inexplicable reason, although I must have heard the thunder muttering, I couldn't take my eyes off the swans. Then it happened--the thing I came here to tell you about; I must tell somebody--the thing that I am not going to forget in a hurry." He began to knock out the ash from his pipe. "Go on," directed Sime tersely. "The big swan--Apollo--was within ten feet of me; he swam in open water, clear of the others; no living thing touched him. Suddenly, uttering a cry that chilled my very blood, a cry that I never heard from a swan in my life, he rose in the air, his huge wings extended--like a tortured phantom, Sime; I can never forget it--six feet clear of the water. The uncanny wail became a stifled hiss, and sending up a perfect fountain of water--I was deluged--the poor old king-swan fell, beat the surface with his wings--and was still." "Well?" "The other swans glided off like ghosts. Several heavy raindrops pattered on the leaves above. I admit I was scared. Apollo lay with one wing right in the punt. I was standing up; I had jumped to my feet when the thing occurred. I stooped and touched the wing. The bird was quite dead! Sime, I pulled the swan's head out of the water, and--his neck was broken; no fewer than three vertebrae fractured!" A cloud of tobacco smoke was wafted towards the open window.