Advance Agent By CHRISTOPHER ANVIL Illustrated by FINLAY [Transcriber's Note: This etext was produced from Galaxy Science Fiction February 1957. Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] Raveling Porcy's systematized enigma, Dan found himself with a spy's worst break--he was saddled with the guise of a famed man! I Dan Redman stooped to look in the mirror before going to see the director of A Section. The face that looked back wasn't bad, if he had expected strong cheekbones, copper skin and a high-arched nose. But Dan wasn't used to it yet. He straightened and his coat drew tight across chest and shoulders. The sleeves pulled up above hands that felt average, but that the mirror showed to be huge and broad. Dan turned to go out in the hall and had to duck to avoid banging his head on the door frame. On the way down the hall, he wondered just what sort of job he had drawn this time. Dan stopped at a door lettered: A SECTION J. KIELGAARD DIRECTOR A pretty receptionist goggled at him and said to go in. Dan opened the inner door. Kielgaard--big, stocky, expensively dressed--looked up and studied Dan as he came in. Apparently satisfied, he offered a chair, then took out a small plastic cartridge and held it in one hand. "Dan," he said, "what do you know about subspace and null-points?" "Practically nothing," admitted Dan honestly. * * * * * Kielgaard laughed. "Then I'll fill you in with the layman's analogy, which is all _I_ know. Suppose you have a newspaper with an ant on the middle of the front page. To get to the middle of page two, the ant has to walk to the edge of the paper, then walk back on the inside. Now suppose the ant could go _through_ the page. The middle of page two is just a short distance away from the middle of page one. That going _through_, instead of around, is like travel in subspace. And a null-point is a place just a short distance away, going through subspace. The middle of page two, for instance, is a null-point for the middle of page one." "Yes," said Dan patiently, waiting for the point of the interview. Kielgaard pushed the plastic cartridge he'd been holding through a slot in his desk. A globe to one side lighted up a cottony white, with faint streaks of blue. "This," he said, "is Porcys." Dan studied the globe. "Under that cloud blanket, it looks as if it might be a water world." "It is. Except for a small continent, the planet is covered with water. And the water is full of seafood--_edible_ seafood." Dan frowned, still waiting. "Galactic Enterprises," said Kielgaard, "has discovered a region in subspace which has Porcys for one null-point and Earth for another."