The future-man smiled. "Yes," he said. "I believe that Dr. Gerard's medication is quite effective. It's made me feel much better already, even though it's the Kralons rather than I who are taking it!" Then he turned to the little investigation agent. "Neat idea of yours, Randall, of synthesizing D.D.T. to fight the Kralons." "D.D.T.?" asked Malherne, who had not been a member of this particular phase of the intrigue. "What's that?" "Dichloro-diphenyl-trichlorethane, to use the generic term for the chemical," replied Dr. Gerard. "It's a chemical insecticide that's quite specific for most insects." "Oh," said the engineer in comprehension. "That's what you were synthesizing instead of sulfonilamide!" "Right," said the little doctor. "But it _is_ a remedy for our troubles, we hope," he added in defense of the deceit they had practiced. The group chuckled at Gerard's righteousness, even in dealing with inhuman monsters. "How long do you think it will take for the chemical to have a material effect on the Kralons?" inquired Lanson. "Shouldn't be too long," interposed Dr. Gerard. "Unlike the insects of our own times, these creatures have had no opportunity to build up an immunity, nor time to mutate as a race to types resistant to chemical insecticides. Therefore its effect should be considerably more rapid than upon even the small insects of the future." Zor Ala nodded in satisfaction. "The floor is yours, Randall," he said. Randall stepped to the center of the group. "We are apparently all in agreement that the zero hour is to be set at 4:00 AM, or 1600 in universal time. That should give sufficient time for the DDT to accomplish its work, and we do not dare delay beyond then for fear that Dr. Gerard's contrivance will be discovered in the morning, thus alerting the Kralons." He paused a moment, his pale gray eyes flicking from one member of the group to another. "It might be wise to keep an eye on Jackson in the meantime," he said. "He undoubtedly has had time to think things over, and to have concluded that Dr. Gerard's fake synthesis and subsequent actions weren't quite plausible under the circumstances." "How did you happen to suspect him in the first place?" asked McClellan. Randall smiled faintly. "It was quite obvious that the salesman lacked courage," he replied. "We all were fully aware of that. Also, both by profession and inclination, Jackson was an opportunist. "In my dealings with the renegades of society, I have always found that to be a deadly combination. A cowardly opportunist can almost always be expected to turn traitor to a cause which offers him any particular inconvenience. Also," he added, "the Kralons asked me several questions about Jackson which set me thinking."