"Search by the Mule" ("Now You See It . . ." in the January 1948
Astounding
) begins the third volume of the
Trilogy,
titled
Second Foundation,
which consists of two novellas. "Search by the Mule" picks up about five years after "The Mule.'' The Mule has consolidated his empire while, through an adjusted Han Pritcher, he has continued his search for the Second Foundation. Now he sends Pritcher out again with the capable but unadjusted Bail Channis. For the first time in the
Trilogy,
the Second Foundation psychologists make an appearance, discussing the situation. It had been discovered in old records that the Second Foundation had been established at "Star's End." Channis decides that "Star's End" must refer to a world called Tazenda, which is isolated in space by a dark cloud of interstellar gas. Pritcher and Channis land on Rossem, a poor, cold, agricultural planet in Tazenda's sphere of influence. After some inquiries, Pritcher accuses Channis of treason to the Mule: Channis found the location of the Second Foundation too easily. But the Mule arrives, having traced their ship, and reveals that he has used Channis, whom he suspects of being a Second Foundation agent, to lead him to the Second Foundation. He has destroyed Tazenda, the Mule says, but then Channis admits, under pressure, that Rossem, not Tazenda, is the location of the Second Foundation. The First Speaker, the leading psychologist of the Second Foundation, enters and reveals that Channis was convinced that Rossem was the location but that was false. The Mule has been lured to Rossem; in his absence Second Foundation psychologists can sow rebellion on Kalgan. The Mule realizes how he has been tricked, and in his moment of lowered defenses the First Speaker enters his mind and reconstructs his memories, eliminating the Mule as a danger.