Dr. Gryce asked, "The air purifiers, Brett? You had no trouble?"

"No. Or very little, except just at first with the chlorate of

potassium. I was telling you about passing Mars. We saw it rising

slowly past us--saw it through a side window. A huge crescent, the

sunlight on half its disk, but even the unlighted portion was plainly

outlined. Above us was the thin crescent earth, with the sun behind it.

The tongues of flame in the sun's envelope were plainer than I had ever

seen them. We were falling away from the earth and sun, into the inky

blackness of Space with its blazing white stars.

"During all this first portion of the trip we were eager to get more

quickly advanced. Beyond Neptune's orbit, with the Solar System once

behind us, we would feel like explorers, even though Nogar--he holds

the record, doesn't he?--went once 27,000 million miles out."

Dr. Gryce put in: "His record was 27,600 million miles from our sun.

At nearly five million miles an hour, which was his maximum velocity

obtainable, that trip for the full return passage consumed--I think the

total time was 461 days."

Brett went on, "That was the record. But even to go a single light-year

at that velocity would have taken Nogar around 84 years--just going out

a little light-year of distance, to say nothing of getting back! And we

had so many thousands of light-years to travel even to get beyond the

stars. It seemed stupendous--impossible."

"Naturally," said Dr. Gryce. "Impossible, of course, had you held to

that size." They were directing their explanations at me. I nodded.

"But you didn't stay that size?" I suggested.

"No, of course not," said Brett. "But for a time, we did--I was

cautious from Mars to Jupiter, Father. Nogar plunged right through the

asteroid region there--plunged through at nearly his five million

miles an hour velocity. I held down to three million. We kept a close

watch, though Martt had a somewhat terrifying experience. Tell them,

Martt."

Martt flushed a trifle. "It wasn't my fault--at least I didn't think

so. At a velocity like that the space there between the orbits of

Mars and Jupiter is horribly crowded. Brett was asleep. I sat by the

instrument table staring down into the floor window at the black

firmament into which we were dropping. You people take a voyage like

this as a matter of course--but it was my first time off earth, and the

beauty of it--of the heavens--well, I tell you it impressed me. The

black firmament--those blazing constellations beneath us--the full moon

of Jupiter every moment growing larger like a white round lamp down

there.

"Well, anyway, perhaps, I was lost in thoughts of it--when leaping

up out of the blackness came a great round silver disk. A hundred

times the size of our full moon. Then a thousand. It was below me,

but off to one side. It swept past, so close I could see its barren,

rocky surface--a range of desolate gray mountains; and I could see,

too, its rotation, like a ball tossed into the air slowly rotating.

Before I could think to do anything--even to make a move--the asteroid

went past, out of my field as I looked through the floor window. For

a moment I saw it rising past a side window and then it was above

us--gone completely beyond my sight in a moment or two. I want to tell

you I was frightened--I called Brett down at once."

Brett laughed. "I found him white, shaking like a tower-trembler.

If a collision had really threatened, he could have thrown the main

Time-switch. Thrown us suddenly into the asteroid's past or future--I

had told him that--but when the danger came, he never thought of it."

"I never did," Martt confessed.

"How close did the asteroid pass?" I asked. "I saw one once, on a

Martian trip----"

"I suppose we passed it at a distance of some three thousand miles,"

Brett answered. "But at three million miles an hour we were traveling

that distance in three or four seconds. It was a narrow escape. The

asteroid's attraction had drawn us aside from our course--but I soon

rectified that."

"I meant to explain about attraction a moment ago, Frank," Dr. Gryce

interrupted. "The attraction of the vehicle on our planets is why

Brett could not yet increase his size. Jupiter and Saturn were pulling

the vehicle onward, and in direct proportion to the mass, of course,

the vehicle was pulling at them. An infinitesimal pull--but had Brett

increased its size materially--while still close to our planets--the

vehicle would have been a seriously disturbing element. I did not want

that. Indeed, with any great size-increase, the vehicle moving out

there would have thrown our whole system into chaos."

Brett said, "I was careful to obey you, Father. We were safely

beyond Saturn--and Uranus and Neptune were on the other side of the

sun--before I even touched the size-switch. From the orbit of Mars to

that of Jupiter there are some 334 million miles between the points

we crossed. We were about 112 hours making the voyage. I kept us well

away--some ten million miles. But the planet was a beautiful sight,

assuming every phase from full to crescent as we passed. You have never

been so close, Father? Nor you, Frank?"

"Nor I," spoke up Frannie. She said it in a whimsical fashion of

pathos, as though to make us all realize that she had been neglected.

Brett laughed affectionately. "No, nor you, little sister. Well, it's

a beautiful sight. You can see it similarly in the telescope, but

somehow, at the same visual distance the naked eye shows it indefinably

different. A beautiful silver disk with the broad dark bands upon it

and the red spot glowing like a lantern in its lower hemisphere.

"Our velocity was slackened for a time as we passed Jupiter, since

I had to lose its great attractive force and turn a neutral side to

it. But once by it, with it blazing as a gigantic thin crescent above

us, I used a full power of its repulsion. We gained velocity rapidly.

With the region of minor planets passed I had no fear of using all the

velocity we could obtain. I think Nogar was unskilful in the handling

of his vehicle; at all events, before we reached the neighborhood of

Saturn, we had attained a velocity of seven and a half million miles an

hour. It was the greatest velocity we reached."

"But," I exclaimed, "but Brett, at seven and one-half million miles

an hour, in your whole life-time--whether you changed your Time-rate

or not, you would have to live those hours--in a whole life-time at

that velocity you wouldn't get one-quarter of the distance even to the

nearest star!"

"No," he agreed. "But I began using the size-change after we passed

Saturn----"

I interrupted again. "I've been wondering about that--I don't quite

see----"

"I'll make it clear to you, Frank, in a moment," Dr. Gryce put in. "Go

on, Brett."

"We were well past Saturn before I changed our size at all. Our average

velocity along there was six million miles an hour--it was a run of

about seventy-five hours. We would have been--even at our maximum of

seven and one-half million miles an hour--more than another 240 hours

getting past Neptune's orbit. It was too tedious. We determined, since

Uranus and Neptune were in other parts of their orbits--far on the

other side of our sun--I decided that once we were well beyond Saturn,

I would start our increase of size. We were seventy million miles

beyond Saturn, with nothing of importance ahead of us but the distant

stars, when I determined to start the change. The space there was

comparatively deserted--a few asteroids--sometimes we could go nearly

an hour without even sighting one.

"With Martt beside me--we were both a little timid about it,

naturally--I threw over the switch and started our growth."

He paused for the length of a breath. "It was extraordinary--all our

experience of the voyage from that moment was extraordinary. I hardly

know how to begin telling you. . . ."

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