progressed, their various actions of good and ill were imprinted. For several days the voyagers travelled in this light-beam, unable even with the powerful instruments to penetrate the distance to its source, and at last they turned aside to resume their flight to Jupiter. Eagerly running the films through the reproducer, they were almost overwhelmed to see the wonderful sights being presented to them as in a book. Although well known in theory, it seemed miraculous to prove by actual sight that the light was carrying on its beams the whole history of a world across the great infinity of space, unfolding it silently and swiftly to all who had eyes to see. “That was the most awesome sight I ever beheld!” said Ross, deeply impressed. “Had we gone forward,” said Godfrey, “we should have come to the world itself and seen what lives the people are leading to-day. If the world exists now!” “Yes,” assented Gilbert, “but we might have gone on for years and then not have come to the source of light,” and then he continued, laughing, “if we get lost and can’t find Earth again, we can hunt up that beam and eventually locate the world it came from! It is so like our own that it would just suit us to settle on.” With that began a general discussion on the probability of losing Earth and the possibilities that would open out in that case, for in the immensity of space where every point can be the centre of infinity, direction seemed of no account. But there was little danger of such a calamity, for so long as they did not travel beyond sight of the sun, or some member of the solar system, they could always return and locate themselves, for the movements of the planets were doubly clear to them by actual sight and not as diagrams drawn on a flat surface. Rapidly they approached the mighty Jupiter, looming before them like a giant golden ball, and they all stood at the windows fascinated by the glorious sight of one of the moons passing before him as a dark, semi-opaque object with an iridescent border. A few hours later the _Regina_ was again in the heavy atmosphere, and Godfrey inquired, “What are you going to do with these people for the trick they played us when we came before?” “We will see,” replied Dennis. “If they are friendly now, we will be friendly too and let bygones be bygones;” and Ross, whose turn it was at the time to pilot the vessel, caused her to settle to within twenty feet of the ground, and connected the protecting current to the outer casing to prevent possible damage being done by the Jovians.