1st appearance of the Spirit, the crime-fighting persona of detective Denny Colt in a 16-page newspaper insert commonly referred to as 'The Spirit Section'
The Spirit Section was first published in assorted U.S. newspapers beginning with the Philadelphia Record, Sunday Star, Detroit News and Star Ledger Newark, NJ on June 2, 1940 and continued through 1954
Each section contained a Spirit tale, later collected in Quality comics' self-titled series plus additional stories
1st appearance of Lady Luck, a costumed detective
1st appearance of Mr. Mystic, a crime-fighting magician