Mr. Blish did indeed write these, but he planned to extend them to novel length, with some additional adventures.
It is an expansion to novel length of a short story that he had published four years earlier.
It was Rob Chilson's return to writing at novel length after a break of over a decade.
Were they no more than a kind of conceptual padding, a way to pump up the premise of the original stories to novel length?
When Kelly was unable to obtain financial backing for the movie, Bradbury expanded the treatment to novel length.
Though originally planned as a short story it had expanded to novel length by the time it was finally completed in late 1871.
At least it rather surfeited me with trying to be scary and nothing else at novel length.
But, stealthily, all the while the detective story at novel length was gaining in popularity.
Before 1982, only a "short fiction" award was presented to works of less than novel length without differentiation between novellas and short stories.
Spun out to novel length, the action becomes episodic, repetitive.