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ing the whole force of the current in his direction, I should arrive at his surface at a speed nearly equal to that at which I had ascended from the Earth. I knew that I could spare force enough to make up for any miscalculation possible, or at least probable. Of course any serious error might be fatal. I was exposed to two dangers; perhaps to three: but to none which I had not fully estimated before even preparing for my voyage. If I should fail to come near enough to the goal of my journey, and yet should go on into space, or if, on the other hand, I should stop short, the Astronaut might become an independent planet, pursuing an orbit nearly parallel to that of the Earth; in which case I should perish of starvation. It was conceivable that I might, in attempting to avert this fate, fall upon the Sun, though this seemed exceedingly improbable, requiring a combination of accidents very unlikely to occur. On the other hand, I might by possibility attain my point, and yet, failing properly to calculate the rate of descent, be dashed to pieces upon the surface of Mars. Of this, however, I had very little fear, the tremendous power of the apergy having been so fully proved that I believed that nothing but some disabling accident to myself—such as was hardly to be feared in the absence of gravitation, and with the extreme simplicity of the machinery I employed—could prevent my being able, when I became aware of the danger, to employ in time a sufficient force to avert it. The first of these perils, then, was the graver one, perhaps the only grave one, and certainly to my imagination it was much the most terrible. The idea of perishing of want in the infinite solitude of space, and being whirled round for ever the