of course we donât know the actual value of the quantities represented: we only knowâand recogniseâthe proportions, the relation of one symbol to another. Thereâs even a clock here: and Iâm willing to swear itâs based on the same principles as our own clocks.â
Matthew hastened to agree. âAfter seeing the linear clocks of Antares and some of the weird devices used by other races,â he said, âit hits you in the eye when you come across a clock that looks like a clock.â
âWhat it amounts to,â murmured Clifford, âis that these creatures started from the same basic suppositions as the builders of our own space shipâof our own civilisation, even. Itâs not just that they worked away at a problem and came to the same conclusion; they started out the same. Thereâs a family likeness in everything here that canât be mistaken. Everything fits into our own scheme of knowledge. And that dying creature spoke to me in our own language. Itâs as though he were a member of a race that had been educated by Earthmen, taught to cope with things as Earthmen cope with them. This race may have learned its groundwork from Earthmen, just as a musical genius-to-be learns his basic theory from a teacher; and then theyâve developed these techniques furtherââ
âAnd then,â Matthew continued, âtheyâve turned against their benefactors.â
âIf they were benefactors,â said Clifford.
âWhat are you getting at?â
âI donât know. It was a thought that came into my head. Iâm not really sure,â he frankly laughed, âthat I know what I mean. I was just groping.â
They looked at the array of displays on the control panel as though expecting them to surrender their meaning at once.
Clifford went on: âBut whatâs so impossible is that if these figures weâve worked out mean anything at allâand they tally in every wayâthis ship travels at a speed that...that...well,â he waved his right hand vaguely, âweâve never believed in such a thing.â
Matthew said: âItâs no good pretending weâre not sure. Weâre quite certain. These figures canât lie. Weâve worked out the relationship between the clock symbols, those four displays above the scanner, and this heap of charts, and we know weâve worked it out right. And if these figures mean what we think they meanâwhat weâre damned sure they meanâthen a ship powered by these engines could reach Earth in twenty-five years.â
Bellhouse shook his head dazedly. He said: âBut that meansââ
âIt means,â said Matthew, âthat if we could transfer the engines to our own ship, or adapt them for our own use, everyone on board could reach Earth alive. Not just myself, and not the descendants of the original crew, but all those who actually embark!â
They went out into the open air and looked up at the stars that were already bright in the first haze of twilight.
Clifford said: âWe donât know how those engines work. We donât know how seriously damaged they are. We donât know if they will work in a larger ship such as ours. But by heaven, weâre going to find out. I want to see Earth and find out what has been happening. The prospect of seeing Earth itself was only a dream, but now itâs a possibility. And by the time weâve finished it will be a probability!â
* * * *
They worked for three months on exasperating preparations that had to be made before the real work could be tackled. Men whose work would have been welcomed full-time on the mechanical side had to spend a certain amount of time on the land, maintaining food supplies for present requirements and preparing concentrates for the journey. Most of the food would of course be grown on board by the shallow culture method, providing concentrates in