"True." Hunt nodded.

Caldwell took this as all the confirmation he needed. "Okay," he said with a gesture of finality. "You’ve done a good job so far on the Charlie side of the picture; maybe it’s time to balance things up a bit and give you a crack at the other side, too. Well"-he shrugged-"the information’s not here-it’s on Ganymede. In six weeks time, J Five shoves off for Ganymede. It makes sense to me that you go with it."

Hunt’s brow remained creased in an expression that indicated he still didn’t quite see everything. He posed the obvious question. "What about the job here?"

"What about it? Basically you correlate information that comes from different places. The information will still keep coming from the places whether you’re in Houston or on board Jupiter Five. Your assistant is capable of stepping in and keeping the routine background research and cross-checking running smoothly in Group L. There’s no reason why you can’t continue to be kept updated on what’s going on if you’re out there. Anyhow, a change of scene never did anybody any harm. You’ve been on this job a year and a half now."

"But we’re talking about a break of years, maybe."

"Not necessarily. Jupiter Five is a later design than J Four; it will make Ganymede in under six months. Also, a number of ships are being ferried out with the Jupiter Five Mission to start building up a fleet that will be based out there. Once a reserve’s been established, there will be regular two-way traffic with Earth. In other words, once you’ve had enough of the place we’ll have no problem getting you back."

Hunt reflected that nothing ever seemed to stay normal for very long when Caldwell was around. He felt no inclination to argue with this new directive. On the contrary, the prospect excited him. But there was something that didn’t quite add up in the reasons Caldwell was giving. Hunt had the same feeling he had experienced on previous occasions that there was an ulterior motive lurking beneath the surface somewhere. Still, that didn’t really matter. Caldwell seemed to have made up his mind, and Hunt knew from experience that when Caldwell made up his mind that something would be so, then by some uncanny power of preordination, so it would inevitably turn out to be.

Caldwell waited for possible objections. Seeing that none were forthcoming, he concluded: "When you joined us, I told you your place in UNSA was out front. That statement implied a promise. I always keep promises."

For the next two weeks Hunt worked frantically, reorganizing the operation of Group L and making his own personal preparations for a prolonged absence from Earth. After that, he was sent to Galveston for two weeks.

By the third decade of the twenty-first century, commercial flight reservations to Luna could be made through any reputable travel agent, for seats either on regular UNSA ships or on chartered ships crewed by UNSA officers. The standards of comfort provided on passenger ifights were high, and accommodation at the larger Lunar bases was secure, enabling Lunar travel to become a routine chore in the lives of many businessmen and a memorable event for more than a few casual visitors, none of whom needed any specialized knowledge or training. Indeed, one enterprising consortium, comprised of a hotel chain, an international airline, a travel-tour operator, and an engineering corporation, had commenced the construction of a Lunar holiday resort, which was already fully booked for the opening season.

Places like Jupiter, however, were not yet open to the public. Persons detailed for assignments with the UNSA deep-space missions needed to know what they were doing and how to act in emergency situations. The ice sheets of Ganymede and the cauldron of Venus were no places for tourists.

At Galveston, Hunt learned about UNSA spacesuits and the standard items of ancillary equipment; he was taught the use of communication equipment, survival kits, emergency life support systems, and repair kits; he practiced test routines, radiolocation procedures, and equipment-fault diagnostic techniques. "Your life could depend on this little box," one instructor told the group. "You could wind up in a situation where it fails and the only person inside a hundred miles to fix it is you." Doctors lectured on the rudiments of space medicine and recommended methods of dealing with oxygen starvation, decompression, heat stroke, and hypothermia. Physiologists described the effects on bone calcium of long periods of reduced body weight, and showed how a correct balance could be maintained by a specially selected diet and drugs. UNSA officers gave useful hints that covered the whole gamut of staying alive and sane in alien environments, from navigating afoot on a hostile surface using satellite beacons as reference points, to the art of washing one’s face in zero gravity.

And so, just over four weeks after his directive from Caldwell, Hunt found himself fifty feet below ground level at pad twelve of number-two terminal complex twenty miles outside Houston, walking along one of the access ramps that connected the wall of the silo to the gleaming hull of the Vega. An hour later, the hydraulic ramps beneath the platform supporting the tail thrust the ship slowly upward and out, to stand clear on the roof of the structure. Within minutes the Vega was streaking into the darkening void above. It docked thirty minutes later, two and a half seconds behind schedule, with the half-mile-diameter transfer satellite Kepler.

On Kepler the passengers traveling on to Luna-including Hunt, three propulsion-systems experts keen to examine the suspected Ganymean gravity drives, four communications specialists, two structural engineers, and Danchekker’s team, all destined to join Jupiter Five-transferred to the ugly and ungainly Capella class moonship that would carry them for the remainder of the journey from Earth orbit to the Lunar surface. The voyage lasted thirty hours and was uneventful. After they had been in Lunar orbit for twenty minutes, the announcement came over the loudspeaker that the craft had been cleared for descent.

Shortly afterward, the unending procession of plains, mountains, crags, and hills that had been marching across the cabin display screen slowed to a halt and the view started growing perceptibly larger. Hunt recognized the twin ring-walled plains of Ptolemy and Albategnius, with its central conical mountain and Crater Klein interrupting its encircling wall, before the ship swung northward and these details were lost off the top of the steadily enlarging image. The picture stabilized, now centered upon the broken and crumbling mountain wall that separated Ptolemy from the southern edge of the Plain of Hipparchus. What had previously looked like smooth terrain resolved itself into a jumble of rugged cliffs and valleys, and in the center, glints of sunlight began to appear, reflected from the metal structures of the vast base below.

As the outlines of the surface installations materialized out of the gray background and expanded to fill the screen, a yellow glow in the center grew, gradually transforming into the gaping entrance to one of the underground moonship berths. There was a brief impression of tiers of access levels stretching down out of sight and huge service gantries swung back to admit the ship. Rows of brilliant arc lights flooded the scene before the exhaust from the braking motors blotted out the view. A mild jolt signaled that the landing legs had made contact with Lunar rock, and silence fell abruptly inside the ship as the engines were cut. Above the squat nose of the moonship, massive steel shutters rolled together to seal out the stars. As the berth filled with air, a new world of sound impinged on the ears of the ship’s occupants. Shortly afterward, the access ramps slid smoothly from the walls to connect the ship to the reception bays.