I thank Damien Broderick for pointing out the clues in the passage in `The Fifth Head of Cerberus' wherein the narrator visits the library and finds old science-fiction books.
It is interesting that this passage differs between the original publication in Orbit 10 (Damon Knight, ed.) and the book edition. The original only mentions Monday or Tuesday and the book on the assassination of Trotsky before ending the paragraph and beginning the next with `I never found any books of my father's'. I found this startling because I had read the book version first, and remembered the Vinge reference very distinctly.
I wonder whether the additional books mentioned (The Mile-Long Spaceship `by some German', and the volume of Vinge) were added by Wolfe to the book version, or edited out of the original by Knight (or at Knight's suggestion).
Also, I note that `VVinge' is to `Wing' as `Wolfe' is to `Wolf', for what it's worthe.
-- Dan Rabin