A Knight of Ghosts and Shadows (Part 1 of 2)

From Author Wars - https://authorwars.com/books/a-knight-of-ghosts-and-shadows-part-1-of-2-112813.html

Overview:

Title: A Knight of Ghosts and Shadows (Part 1 of 2)
Author: Poul Anderson
Year: 1974
Type: Serials

Editions/Publications:

Unknown. Worlds of If, September-October 1974 (Unknown, Poul Anderson, UPD Publishing Corporation, $0.75, 180 pages, digest, MAGAZINE)
Unknown. Worlds of If, September-October 1974 [UK] (Unknown, Poul Anderson, Universal-Tandem Publishing Company Ltd., £0.30, 180 pages, digest, MAGAZINE)