After Trent's Last Case, E.C. Bentley might have been expected to kick off a series in order to capitalize on its success. But in fact he doesn't seem to have been that interested; the follow-up came several decades later and was a collaboration with another writer. While he wrote short stories featuring the character, they are few and far between. Most of them were collected in the 1938 collection Trent Intervenes, with one extra that would be added to later editions. Three stories, The…