...Closely allied to this marble is an ancient species which puzzles mostvisitors by its Protean appearance... 
Hugh Macmillan 「Roman Mosaics」
...Whereas your landscapes, though lovely, are stationary,unchangeable except through herculean efforts, ours are Protean,eternally changing...
Various 「Astounding Stories of Super-Science, May, 1930」
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この漢字は何でしょう？？