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'An invaluable sourcebook and an exceptional contribution that substantially readjusts the historical record. ... We are given a brief informative overview hitherto unparalleled in scope and depth of the man's life and times. ... It is a pleasure to follow the author in this exciting piece of intellectual detective work.' - Aant Elzinga, Professor emeritus, University of Gothenburg, Sweden
'An amazing achievement.' - Ian R. Stone, Editor, Polar Record