They wouldn't close though, and the spacemen died puzzled as to why not.
"For Every Man A Reason"
Patrick Wilkins
There was much mourning aboard the Herringbone-for, with its lovable personality and innocently engaging ways, the little fellow had won its way into the hearts of all the spacemen-until the first officer discovered a substantial pink cocoon resting on the ship's control board and rushed to the intercom to spread the glad tidings.
"Once a Greech"
Evelyn E. Smith
There were clerks; laborers; poor but haughty nobles: and wealthy merchants who had long been forced to hide their riches from the dictator's tax-gatherers, and soldiers, and spacemen.
"Flight From Tomorrow"
Henry Beam Piper