"Liars! Cheats!" whimpered Betsy O'Reilly as she tossed on the lumpy bed of her third class room and recalled the sky poster that had hypnotized her.

Now, Betsy was disappointed and bored. Slim, pretty, freckled and pert, but ten years older than she wished, she had mortgaged her secretarial salary to engage once more in The Eternal Quest. And, as always, the quest was proving futile. Eligible bachelors shunned Dawningsburgh as they did other expensive tourist traps. The "new friends" she had made were either loudmouthed, hairy miners en route to or from the orichalcum diggings, or middle-aged couples on tragic second honeymoons, or self-styled emigre artists and novelists intent on cadging free meals and any other favors that lonely females might grant.

But maybe, Betsy tried to console herself, there was something real here; something glamorous that she could find and cling to during the long months back in New York when she would have to subsist on soups and salads in order to pay her debt to Trans-Plan. Mars had been great, the guides insisted. Once, they said, it had even colonized Atlantis. Perhaps, under the sham and away from those awful conducted tours, something was still left that could make her feel a trifle less forlorn.

Betsy jumped out of bed and rummaged in a closet. There it was! A heated emergency garment equipped with plastic helmet, air pack and a searchlight. Required by law but seldom used, since tourists were told to stay off the 60° below zero streets at night.

Wriggling into the clumsy thing, she tested valves and switches as she had been instructed. Then she tiptoed out of her cubbyhole, down a corridor and into the hotel lobby.

The room clerk did not greet her with its usual trill. A robot, built on Earth as a "stand-in" for one of the vanished Martians, it had turned itself off when the last tourists left the dining room for their beds. But how lifelike it still looked, balancing on a perch behind the ornate plastic desk. And how human too, despite the obviously avian ancestry of the race it mimicked. What was it the guides had said about the way in which all intelligent lifeforms so far discovered closely resembled one another? Why, even artificial Martians made the average human look drab and clumsy.

Betsy circled the overdecorated room like a shadow and pushed against the street door. Escaping air whistled through the crack.