I found myself lying prone upon a bed of yellowish, mosslike vegetation which stretched around me in all directions for interminable miles. I seemed to be lying in a deep, circular basin, along the outer verge of which I could distinguish the irregularities of low hills. It was midday, the sun was shining full upon me and the heat of it was rather intense upon my naked body, yet no greater than would have been true under similar conditions on an Arizona desert. Here and there were slight outcroppings of quartz-bearing rock which glistened in the sunlight; and a little to my left, perhaps a hundred yards, appeared a low, walled enclosure about four feet in height. No water, and no other vegetation than the moss was in evidence, and as I was somewhat thirsty I determined to do a little exploring. Springing to my feet I received my first Martian surprise, for the effort, which on Earth would have brought me standing upright, carried me into the Martian air to the height of about three ...