"Then why—"
"Later," Sims said. "You're entitled to an explanation, but right now I'd appreciate it if you'd finish your statement. What makes the natives insect-proof?"
"Vorkum."
"That gunk?"
"That's the repellent."
"In more ways than one," Sims said.
"It's not so bad after you get used to it. It just smells awful at first."
"That's an understatement, if I ever heard one."
"Perhaps the lab can analyze it and find the active principle," Lanceford said hopefully.