A. R. WALLACE PAPERS. Vol. XV (ff . 259). 'Is Mars Habitable?', published 1907. Viz.:- (a) Autograph draft, apparently completed 1-19 October 1907, and wanting frontispiece, last paragraph of the preface, and the letter from J. H. Poynting printed on pp. 53-54. Paginated in chapters by the autho...