Synopsis
History
First publication: New Writings in S-F 3, edited by John Carnell, Dennis Dobson, 1965
Review
Videos
We have the story in these editions:
All of the stories in the Unorthodox Engineers series:
The Railways Up on Cannis
The Subways of Tazoo
The Pen and the Dark
Getaway from Getawehi
The Black Hole of Negrav