Planet: Caldonia. A race of three-fingered beings over six feet tall, their enlarged cranium includes a raised bony framework shaped much like a perpendicular "theta" Greek letter. Primarily scholars on a world committed to pure research, they bid for the rights to the Barzan wormhole until negotiator Leyor pulls out after some persuasion that Caldonians might not be willing to take on the mundane administration of the phenomenon.