As might naturally be expected in the clear rarefied atmosphere through which we were travelling, the various heavenly bodies shone much more brilliantly than ever they appear from Earth; and the vast, unfathomable vault of space was intensified in colour--very different from the blue of an earthly night-sky, and entirely free from cloud. The moon was perceptibly larger than she appears when viewed from Earth; but the other orbs only differed in the intensity and brilliancy of their light. "Mr. Graham! Doctor! Doctor! the engine is going wrong!" Sandy was heard shouting. "Be calm, Sandy," said the Doctor, as he and his two friends hurriedly descended into the engine-room. It was manifest that something had gone wrong with the machinery, and the anxiety of all was plainly visible as the Doctor and Graham hastened to make an examination. "Thank heaven, the motors are safe," said Graham. "It is only the pin out of the rod of one of the condensing pistons," calmly remarked the Doctor; and Graham soon put all to rights again. Some time elapsed before the excitable Sandy could be pacified. He fully expected we were going to be dashed to pieces on the distant Earth. The Doctor took this opportunity of pointing out to us how necessary it was to keep a constant watch on our apparatus; for the least mishap might speedily lead to a calamity so appalling as to send a thrill of horror to the stoutest heart amongst us at the mere thought of it. CHAPTER III. OUR VOYAGE BEYOND THE CLOUDS. Long before morning dawned over Earth, on the second day of our voyage through space, we had reached such an enormous altitude, that even the outlines of the continents could not be traced with any degree of clearness. The large masses of land were sharply defined from the oceans, but all trace of peninsulas, isthmuses, and islands was lost. The Polar crescents of gleaming snow stood clearly out in bold relief, but the waters of the Earth were becoming very grey in appearance. By 9 a.m. on the 3rd of May, we were close upon forty thousand miles above the Earth. Our life in the _Sirius_ was very methodical, and a brief description of one day's routine will be sufficient for the purposes of this narrative.