Shores of the Polar Sea: A Narrative of the Arctic Expedition of 1875-6.

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p. 9: While our two ships steamed northward along the west shores of Greenland, the novel charm of constant daylight was felt by every one. We all had our own ideas of what Arctic summer would be like, but ideas drawn from books rarely remain unchanged when brought face to face with reality. Although the passage into perpetual day was of course gradual, yet it was quite rapid enough to upset all regular habits.