IT WAS A QUARTER of an Earth century before Mars was again visited by humans. Six years after the Envoy was silent, the drone probe Zombie, sponsored jointly by the Geographic Society and La Société Astronautique Internationale, bridged the void and took up an orbit for the waiting period, then returned. The photographs taken by the robot vehicle showed a land unattractive by human standards; her recording instruments confirmed the thinness and unsuitability of the Arean atmosphere to human life.
But the Zombie's pictures showed clearly that the "can*ls" were engineering works of some sort and there were other details which could only be interpreted as ruins of cities. A manned expedition on a major scale and without delay surely would have been mounted had not World War III intervened.
But the war and the delay resulted eventually in a much stronger, safer expedition than that of the lost Envoy. The Federation Ship Champion, manned by an all-male crew of eighteen experienced spacemen and carrying more than that number of male pioneers, made the crossing under Lyle Drive in only nineteen days. The Champion landed just south of Lacus Soli, as Captain van Tromp intended to search for the Envoy. The second expedition reported to Earth by radio daily, but three dispatches were of more than scientific interest. The first was:
"Rocket Ship Envoy located. No survivors."
The second worldshaker was: "Mars is inhabited."
The third was: "Correction to dispatch 23-105: One survivor of Envoy located."