"One of the chief officers of the Martians wished me to remain alive. He, with his aides, carried me to one of the military depot of supplies, where I was found and rescued," and as she said this she turned toward Colonel Smith with a smile that reflected on his ruddy face and made it glow like a Chinese lantern. "By ----!" muttered Colonel Smith, "that was the fellow we blew into nothing! Blast him, he got off too easy!" The remainder of Aina's story may be briefly told. When Colonel Smith and I entered the mysterious building which, as it now proved, was not a storehouse belonging to a village, as we had supposed, but one of the military depots of the Martians, the girl, on catching sight of us, immediately recognized us as belonging to the strange squadron in the sky. As such she felt that we must be her friends, and saw in us her only possible hope of escape. For that reason she had instantly thrown herself under our protection. This accounted for the singular confidence which she had manifested in us from the beginning. Her wonderful story had so captivated our imaginations that for a long time after it was finished we could not recover from the spell. It was told over and over again from mouth to mouth, and repeated from ship to ship, everywhere exciting the utmost astonishment. Destiny seemed to have sent us on this expedition into space for the purpose of clearing off mysteries that had long puzzled the minds of men. When on the moon we had unexpectedly to ourselves settled the question that had been debated from the beginning of astronomical history of the former habitability of that globe. A Question Settled. Now, on Mars, we had put to rest no less mysterious questions relating to the past history of our own planet. Adelung, as the Heidelberg Professor asserted, had named the Vale of Cashmere as the probable site of the Garden of Eden, and the place of origin of the human race, but later investigators had taken issue with this opinion, and the question where the Aryans originated upon the earth had long been one of the most puzzling that science presented. This question seemed now to have been settled. Aina had said that Mars had completed 5,000 circuits about the sun since her people were brought to it as captives. One circuit of Mars occupies 687 days. More than 9,000 years had therefore elapsed since the first invasion of the earth by the Martians. Another great mystery--that of the origin of those gigantic and inexplicable monuments, the great pyramids and the Sphinx, on the banks of the Nile, had also apparently been solved by us, although these Egyptian wonders had been the furthest things from our thoughts when we set out for the planet Mars. We had travelled more than thirty millions of miles in order to get answers to questions which could not be solved at home. But from these speculations and retrospects we were recalled by the commander of the expedition. Does Aina Hold the Secret?