... does not seem to extend for more than a quarter of a mile from the berg. Here there are cracks and constant slight movement, which becomes exciting to the traveller when he feels a piece of ice gradually upending beneath his feet. Close to the berg the pressure makes all sorts of quaint noises. We heard tapping as from a hammer, grunts, groans and squeaks, electric trams running, birds singing, kettles boiling noisily, and an occasional swish as a large piece of ice, released from pressure, suddenly ... — South! • Sir Ernest Shackleton
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