Seaton, knowing from the data of their first journey, that the controls could be so set as to duplicate their feat in every particular without supervision, stepped into his seat in the new controller, pressed a key, and spoke. "Hi, Dottie, what's on your mind?" "Nothing much," Dorothy's clear voice answered. "Got it done and can I see it?" "Sure--sit tight and I'll send a boat after you." As he spoke, Rovol's flier darted into the air and away; and in two minutes it returned, slowing abruptly as it landed. Dorothy stepped out, radiant, and returned Seaton's enthusiastic caresses with equal fervor before she spoke. "Lover, I'm afraid you violated all known speed laws getting me over here. Aren't you afraid of getting pinched?" "Nope--not here. Besides, I didn't want to keep Rovol waiting--we're all ready to go. Hop in here with me, this left-hand control's mine." Rovol entered the tube, took his place, and waved his hand. Seaton's hands swept over the keys and the whole gigantic structure wafted into the air. Still upright, it was borne upon immense rods of force toward the Area of Experiment, which was soon reached. Covered as the Area was with fantastic equipment, there was no doubt as to their destination, for in plain sight, dominating all the lesser instruments, there rose a stupendous telescopic mounting, with an enormous hollow tube of metallic lattice-work which could be intended for nothing else than their projector. Approaching it carefully, Seaton deftly guided the projector lengthwise into that hollow receptacle and anchored it in the exact optical axis. Flashing beams of force made short work of welding the two tubes together immovably with angles and lattices of the same purple metal, the terminals of the variable-speed motors were attached to the controllers, and everything was in readiness for the first trial. "What special instructions do we need to run it, if any?" Seaton asked of the First of Mechanism, who had lifted himself up into the projector. "Very little. This motor governs the hour motion, that one the right ascension. The potentiometers regulate the degree of vernier action--any ratio is possible, from direct drive up to more than a hundred million complete revolutions of that graduated dial to give you one second of arc." "Plenty fine, I'd say. Thanks a lot, ace. Whither away, Rovol--any choice?" "Anywhere you please, son, since this is merely a try-out." "O. K. We'll hop over and tell Dunark hello." The tube swung around into line with that distant planet and Seaton stepped down hard, upon a pedal. Instantly they seemed infinite myriads of miles out in space, the green system barely visible as a faint green star behind them.