Lucerne: The Loaded Tourist
Written by
Leslie Charteris
Copyright 1953
Published as The Russian Prisoner in 2 issues of The Saint Mystery Magazine (US - Oct. 1963 & UK - Feb. 1964), then The Saint Magazine in June 1984. Also published in the collection .
The murder of a man about to emigrate to America gets the Saint involved, leading to a briefcase full of diamonds.