Red Witch of Mercury

Death was Jaro Moynahan's stock in trade, and every planet had known his touch. But now, on Mercury, he was selling his guns into the weirdest of all his exploits—gambling his life against the soft touch of a woman's lips.
On the stage of Mercury Sam's Garden , a tight-frocked, limber-hipped, red-head was singing The Lady from Mars . The song was a rollicking, ribald ditty, a favorite of the planters and miners, the space pilots and army officers who frequented the garden. The girl rendered it with such gusto that the audience burst into a roar of applause.
She bent her head in acknowledgment so that her bronze red hair fell down about her face. There was perspiration on her upper lip and temples. Her crimson mouth wore a fixed smile. Her eyes were frightened.
The man, who had accompanied the singer on the piano, sat at the foot of the stage, his back to the crowded tables. He did not look up at the singer but kept his pale, immature face bent over the keys, while his fingers lightly, automatically picked out the tune. Sweat trickled down the back of his neck, plastered his white coat to his back. Without looking up, he said: Have you spotted him? His voice was pitched to reach the singer alone.
The girl, with an almost imperceptible gesture, shook her head.
The night was very hot; but then it is always hot on Mercury, the newest, the wildest, the hottest of Earth's frontiers. Fans spaced about the garden's walls sluggishly stirred the night air, while the men and women sitting at the tables drank heavily of Latonka, the pale green wine of Mercury. Only the native waiters, the enigmatic, yellow-eyed Mercurians, seemed unaffected by the heat. They didn't sweat at all.
Up on the stage the singer was about to begin another number when she stiffened.
Here he is, she said to the pianist without moving her lips.
The pianist swung around on his stool, lifted his black eyes to the gate leading to the street.
Just within the entrance, a tall, thin man was standing. He looked like a gaunt gray wolf loitering in the doorway. His white duraloes suit hung faultlessly. His black hair was close-cropped, his nose thin and aquiline. For a moment he studied the crowded garden before making his way to a vacant table.