_The Barsoom_ was larger than the craft dispatched by the Martians, with the result that we were able to carry supplies for fifteen years. We were equipped with more powerful motors which would permit us to maintain an average speed of over twelve hundred miles an hour, carrying in addition an engine recently developed by Orthis which generated sufficient power from light to propel the craft at half-speed in the event that our other engine should break down. None of us was married, Orthis’ abandoned wife having recently died. Our estates were taken under trusteeship by the government. Our farewells were made at an elaborate ball at the White House on December 24, 2025, and on Christmas day we rose from the landing stage at which _The Barsoom_ had been moored, and amid the blare of bands and the shouting of thousands of our fellow countrymen we arose majestically into the blue. I shall not bore you with dry, technical descriptions of our motors and equipment. Suffice it to say that the former were of three types—those which propelled the ship through the air and those which propelled it through ether, the latter of course represented our most important equipment, and consisted of powerful multiple-exhaust separators which isolated the true Barsoomian Eighth Ray in great quantities, and, by exhausting it rapidly earthward, propelled the vessel toward Mars. These separators were so designed that, with equal facility, they could isolate the Earthly Eighth Ray which would be necessary for our return voyage. The auxiliary engine, which I mentioned previously and which was Orthis’ latest invention, could be easily adjusted to isolate the eighth ray of any planet or satellite or of the sun itself, thus insuring us motive power in any part of the universe by the simple expedient of generating and exhausting the eighth ray of the nearest heavenly body. A fourth type of generator drew oxygen from the ether, while another emanated insulating rays which insured us a uniform temperature and external pressure at all times, their action being analogous to that of the atmosphere surrounding the earth. Science had, therefore, permitted us to construct a little world, which moved at will through space—a little world inhabited by five souls.