In a moment our mirror-grid was glowing with the two-foot square image of the interior of the Red Spark Cafe. I knew the place by reputation: a fashionable, more or less disreputable eating, drinking and dancing restaurant, where money and alcholite flowed freely. The patrons were successful criminals of the three worlds, intermingled with thrilled, respectable tourists who hoped they would see something really evil. The Red Spark was not far from Halsey's office; it was perched high in a break of the city roof, almost directly over Park-Circle 29. "There he is," said Halsey. We crowded around his desk. The image showed the interior of a large oval room, balconied and terraced; a dais dance-floor, raised high in the center with three professional couples gyrating there; and beneath them the public dance-grid, slowly rotating on its central axis. A hundred or so couples were dancing. The lower floor was crowded with dining tables; others were upon the little catwalk balconies, and still others in the terraced nooks and side niches, half-enshrouded, half-revealed by colored draperies. The image now was silent, for Halsey was not bothering with audio connection. But it was a riot of color, flashing colored floodlights bathing the dancers in vivid tints; and there were twinkling spots of colored tube-lights on all the tables. I saw, too, the blank rectangles of darkness against the walls which marked the private dining rooms, insulated against sight and sound. Here one might go for frivolous indiscretion, or for conspiracy, perhaps, and be as secure from interruption as we were, here in Halsey's office. Venza asked eagerly, "Which is he?" "Over there on the third terrace to the left. That table. There seem to be six of them in the party." We heard Francis' voice; he was in Halsey's lower Manhattan office, with this same image before him. "We'll get a closer view." The table in question was no more than a square inch on our image. We could see an apparently gay party of men and women. One of the couples was gigantic, a Martian man and woman, obviously. The others seemed to be Earth or Venus people. Francis' voice added: "I've got an audio magnifier on them. Foley's been listening for an hour. Nice, clear English. Much good it does us; this fellow is as cautious as a director of the lower air-lane. Here's your near-look." Our image shifted to another view. The lens-eye with which we were connected now gave us a view directly over the Martian's table. We were looking down diagonally upon the table, at a distance of no more than ten feet. There were three Earthwomen in the party. There was nothing peculiar about them. They were rather handsome, dissolute in appearance, all of them obviously befuddled by alcholite. There was a man who could have been Anglo-Saxon. A wastrel, probably, with more money than wit; he wore a black dinner suit edged with white.