The space freighter Queen Dierdre was a great, squat, pockmarked vessel of the Earth-Mars run and she never gave anyone a bit of trouble. That should have been sufficient warning to Mr. Watkins, her engineer. Watkins was fond of saying that there are two kinds of equipment — the kind that fails bit by bit, and the kind that fails all at once.

Watkins was short and red-faced, magnificently mustached, and always a little out of breath. With a cigar in his hand, over a glass of beer, he talked most cynically about his ship, in the immemorial fashion of engineers. But in reality, Watkins was foolishly infatuated with Dierdre , idealized her, humanized her, and couldn't conceive of anything serious ever happening.

On this particular run, Dierdre soared away from Terra at the proper speed; Mr. Watkins signaled that fuel was being consumed at the proper rate; and Captain Somers cut the engines at the proper moment indicated by Mr. Rajcik, the navigator.

As soon as Point Able had been reached and the engines stopped, Somers frowned and studied his complex control board. He was a thin and meticulous man, and he operated his ship with mechanical perfection. He was well liked in the front offices of Mikkelsen Space Lines, where Old Man Mikkelsen pointed to Captain Somers' reports as models of neatness and efficiency. On Mars, he stayed at the Officers Club, eschewing the stews and dives of Marsport. On Earth, he lived in a little Vermont cottage and enjoyed the quiet companionship of two cats, a Japanese houseboy, and a wife.