"Permit me to present an example. If the barytrine field went on at this instant, one thousand years from now my successor would pick up the thread of the conversation from the recording we are making, and take on from here. As far as you are concerned the only difference would be a sudden flick of the viewscreen and a rather abrupt change in the facial characteristics of your conferee." Gant Nerley waited a moment to let the point sink in. "Now, since you and I have very little in common, it should make little difference to you whether you spoke to me or to someone else. And as far as I am concerned, I feel the same. I have long since ceased feeling regretful that I cannot retain friendship with the hundreds of thousands of people with whom I must converse. I have almost stopped being regretful of the fact that there are so many worlds that no single lifetime would permit a visit to more than a fraction. I suggest that you try to take a more lasting attitude. You sound as though the troubles of a world you never saw were of prime importance to you." "Look," said Dusty testily, "A lot of what you claim may be true. But we have a couple of thousand years of observational data on the planets and the nearby stars. You may take a thousand years out of our lives in the twinkle of a second, but then we spend another five hundred on top of that finding out where we are." "You have time." "We have not!" roared Dusty. "Move us to a new system and I'll tell you what'll happen. Before we can make a move into space we have to chart the new system completely, because we admit that our reaction motors are not efficient enough to take off without a well precharted course. We must know the orbits of the planets to a fine degree before we dare. Then, before we can make a try for the stars, we've got to spend years and years in observation before we can chart the nearest stars and observe whether or not they might have planets, our astronomy will be put back. Now--" "Pardon me, but the information I have regarding your system is before me. Your space travel is primitive and any form of real commerce is as yet impossible. This I get from the license application for barytrine operations. Now, how can you justify your statements about interstellar travel?"