This was not the first time Nisa had seen her commander at the control desk in a moment of great responsibility. With his impenetrably expressionless face and his abrupt but always precise movements he seemed like a hero of legendary times to the auburn-haired astronavigator.

Again Tantra continued her hopeless journey round Zirda, this time from pole to pole. In some places, especially in the temperate latitudes, there were wide belts of bare earth, a yellow haze hung over them and through it, from time to time, appeared the lines of gigantic red dunes from which the wind sent up clouds of sand.

Then again came the funereal pall of black velvet poppies, the only plant that had withstood radioactivity or had produced a mutation of its species viable under irradiation.

The whole picture was clear. It was not only useless, it was even dangerous to search for supplies of anameson that had, on the recommendation of the Great Circle, been laid in for visitors from other worlds (Zirda had no spaceships of her own, only planetships). Tantra began slowly unwinding the spiral away from the planet. She gained a velocity of 17 kilometres a second using her ion trigger motors, the planetary motors that gave her speed enough for trips between adjacent planets and for taking off and landing, and drew away from the dead planet. Tantra turned her nose towards an uninhabited system known only by its code name where bomb beacons had been thrown out and where Algrab should have awaited her. The anameson motors were switched on and in fifty-two hours they accelerated the spaceship to her normal speed of 900,000,000 kilometres an hour. Fifteen months’ journey would take them to the meeting place — eleven months of the dependent time of the ship — and the whole crew, with the exception of those on watch, could spend that time in sleep. A month, however, passed in discussion, in calculations and in the preparation of a report for the Council. From reference books it was discovered that risky experiments had been made on Zirda with partially disintegrating atomic fuels. They found references to statements by leading scientists who warned the people that there were symptoms of the adverse biological effect of the experiments and demanded that they be stopped.