Astronomers have agreed in declaring that Mars is undoubtedly habitable by beings like ourselves, but, as may be supposed, I was not in a mood to be satisfied with considering it merely habitable. I allowed no sort of question that it was inhabited. What manner of beings these inhabitants might be I found a fascinating speculation. The variety of types appearing in mankind even on this small Earth makes it most presumptuous to assume that the denizens of different planets may not be characterized by diversities far profounder. Wherein such diversities, coupled with a general resemblance to man, might consist, whether in mere physical differences or in different mental laws, in the lack of certain of the great passional motors of men or the possession of quite others, were weird themes of never-failing attractions for my mind. The El Dorado visions with which the virgin mystery of the New World inspired the early Spanish explorers were tame and prosaic compared with the speculations which it was perfectly legitimate to indulge, when the problem was the conditions of life on another planet. It was the time of the year when Mars is most favorably situated for observation, and, anxious not to lose an hour of the precious season, I had spent the greater part of several successive nights in the observatory. I believed that I had made some original observations as to the trend of the coast of Kepler Land between Lagrange Peninsula and Christie Bay, and it was to this spot that my observations were particularly directed. On the fourth night other work detained me from the observing-chair till after midnight. When I had adjusted the instrument and took my first look at Mars, I remember being unable to restrain a cry of admiration. The planet was fairly dazzling. It seemed nearer and larger than I had ever seen it before, and its peculiar ruddiness more striking. In thirty years of observations, I recall, in fact, no occasion when the absence of exhalations in our atmosphere has coincided with such cloudlessness in that of Mars as on that night. I could plainly make out the white masses of vapor at the opposite edges of the lighted disc, which are the mists of its dawn and evening. The snowy mass of Mount Hall over against Kepler Land stood out with wonderful clearness, and I could unmistakably detect the blue tint of the ocean of De La Rue, which washes its base,--a feat of vision often, indeed, accomplished by star-gazers, though I had never done it to my complete satisfaction before.