Saint Errant, a 1948 short story collection by Leslie Charteris which introduces a somewhat different version of the Saint.
Simon Templar is now a loner, with just the slightest touch of melancholy although of course combined with his thirst for adventures. The adventures are no longer as outlandish.
Very different in tone from the early 30s Saint stories.
My review: https://vintagepopfictions.blogspot.com/2019/05/leslie-charteriss-saint-errant.html