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 yards.
I alighted softly upon the ground, however, without appreciable
shock or jar. Now commenced a series of evolutions which even then
seemed ludicrous in the extreme. I found that I must learn to walk
all over again, as the muscular exertion which carried me easily and
safely upon Earth played strange antics with me upon Mars.

Instead of progressing in a sane and dignified manner, my attempts
to walk resulted in a variety of hops which took me clear of the
ground a couple of feet at each step and landed me sprawling upon my
face or back at the end of each second or third hop. My muscles,
perfectly attuned and accustomed to the force of gravity on Earth,
played the mischief with me in attempting for the first time to cope
with the lesser gravitation and lower air pressure on Mars.

I was determined, however, to explore the low structure which was