The End of the Tether by Joseph Conrad

The knowledge was too disturbing, really. There was "something wrong" with a vengeance, and the moral certitude of it was at first simply frightful to contemplate. Sterne had been looking aft in a mood so idle, that for once he was thinking no harm of anyone. His captain on the bridge presented himself naturally to his sight. How insignificant, how casual was the thought that had started the train of discovery -- like an accidental spark that suffices to ignite the charge of a tremendous mine!

Caught under by the breeze, the awnings of the foredeck bellied upwards and collapsed slowly, and above their heavy flapping the gray stuff of Captain Whalley's roomy coat fluttered incessantly around his arms and trunk. He faced the wind in full light, with his great silvery beard blown forcibly against his chest; the eyebrows overhung heavily the shadows whence his glance appeared to be staring ahead piercingly. Sterne could just detect the twin gleam of the whites shifting under the shaggy arches of the brow. At short range these eyes, for all the man's affable manner, seemed to look you through and through. Sterne never could defend himself from that feeling when he had occasion to speak with his captain. He did not like it. What a big heavy man he appeared up there, with that little shrimp of a Serang in close attendance -- as was usual in this extraordinary steamer! Confounded absurd custom that. He resented it. Surely the old fellow could have looked after his ship without that loafing native at his elbow. Sterne wriggled his shoulders with disgust. What was it? Indolence or what?