Assertion: astronomer | /r/CapableOf | chart heaven
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text: Greatest mathematical distance of all was that between Captain Duncan's mind and the mind of an astronomer who charted the heavens and navigated a thousand million miles away among the stars and who tossed, a mere morsel of his mathematical knowledge, the few shreds of information to Captain Duncan that enabled him to know from day to day the place of the Makambo on the sea.