This suggestion was immediately accepted, and the squadron having been signalled to assemble quickly bore off in the direction of the more distant moon of Mars, Deimos. We knew that it was slightly smaller than Phobos, but its greater distance gave promise that it would better serve our purpose of temporary concealment. The moons of Mars, like the earth's moon, always kept the same face toward their master. By hiding behind Deimos we should escape the prying eyes of the Martians, even when they employed telescopes, and thus be able to remain comparatively close at hand, ready to pounce down upon them again, after we had obtained, as we now had good hope of doing, information that would make us masters of the situation.
CHAPTER THIRTEEN
THERE WERE GIANTS IN THE EARTH
Deimos proved to be, as we had expected, about six miles in diameter. Its mean density is not very great so that the acceleration of gravity did not exceed one-two-thousandths of the earth's. Consequently the weight of a man turning the scales at 150 pounds at home was here only about one ounce.
The result was that we could move about with greater ease than on the golden asteroid, and some of the scientific men eagerly resumed their interrupted experiments.
But the attraction of this little satellite was so slight that we had to be very careful not to move too swiftly in going about lest we should involuntarily leave the ground and sail out into space, as, it will be remembered, happened to the fugitives from the fight on the asteroid.
Not only would such an adventure have been an uncomfortable experience, but it might have endangered the success of our scheme. Our present distance from the surface of Mars did not exceed 12,500 miles, and we had reasons to believe the Martians possessed telescopes powerful enough to enable them not merely to see the electrical ships at such a distance, but to also catch sight of us individually. Although the cloud curtain still rested on the planet it was probable that the Martians would send some of their airships up to its surface in order to determine what our fate had been. From that point of vantage with their exceedingly powerful glasses, we feared that they might be able to detect anything unusual upon or in the neighborhood of Deimos.
Accordingly strict orders were given, not only that the ships should be moored on that side of the satellite which is perpetually turned away from Mars, but that, without orders, no one should venture around on the other side of the little globe or even on the edge of it, where he might be seen in profile against the sky.
Still, of course, it was essential that we, on our part, should keep a close watch, and so a number of sentinels were selected, whose duty it was to place themselves at the edge of Deimos, where they could peep over the horizon, so to speak, and catch sight of the globe of our enemies.