From this she presently rose easily and smoothly, like a huge bird wending its way upwards in a series of graceful circles. Like a bird, too, she had at first enormous wings spread out to the air. But after a time, as she gained the upper air, these were folded away, the upper covering was replaced, and she became once more the great, egg-shaped mass she had appeared when she had arrived beside the island. How, afterwards, she continued to force her way upwards against the attraction of the Earth, was King Ivanta’s own secret. It was believed that he had discovered a means of using the sun’s more powerful attractive force, and so controlling it as to make it do whatever he required; but that was probably only a guess. What is certain is that the whole structure continued to rise steadily and smoothly upwards, till presently Gerald and Jack were called by Mr Armeath and the engineer, Mr Monck, to come to a sort of periscope, from which they could take their last look at the Earth. They stepped forward and stared through the opening in startled wonder. There, they saw our globe, looking like an enormous ball. The great airship itself was perfectly steady, and appeared to be absolutely motionless. Not a tremor was to be felt, and it seemed as though it was the Earth which was receding from them at a rapid rate, not they from the Earth. No longer, however, could they make out details upon its surface; the distance was already too great. All they could distinguish were the respective masses of land and water, broadly mapped and marked out as they are upon a school globe representing the Earth. The side they were looking at showed the New World—the great continents of North and South America and the oceans surrounding them—and that was all. Who shall attempt to describe their feelings, or guess their thoughts, as they stood there gazing at this strange appearance of the planet upon which they had lived all their lives? Probably they then for the first time fully realised the actual nature of the risks they were running; and it is more than likely that they were wondering whether they were looking their last upon the Earth, as they watched it sinking silently away into the immeasurable distance! *CHAPTER VIII.* *A NARROW ESCAPE.* The first part of the time which followed upon the departure from the Earth of the _Ivenia_ on her long journey through space was one of great enjoyment to the two chums. The marvels and mysteries of the great airship—or aerostat, as Mr Armeath preferred to call her—seemed to be inexhaustible. ’Every day’ the young people found something new and strange, to puzzle over. Every time they moved about they came upon some unexpected revelation of the wondrous inventions and contrivances which it had been necessary to bring to perfection before the great machine could start upon the adventurous journeys she had undertaken.