A short story by Andre Norton. Quite different for its time period with a knowledgeable female protagonist and her grey cat. The fact that all Cats are gray has nothing to do with the color of the cat, but the fact that they see in gray scale.
I love the way the story within a story plays out.
All Cats are Grey
Great short story!
Wow a new Andre Norton!
I thought I had read everything of hers. This was just a short story, raw, but still Norton.