H. C. Bailey
3 appearances across 3 restored issues — every one readable in full, free.
Adventure Magazine Cover — 1911 “Black Magic” Read the full issue (196 pages) → 
Adventure Magazine Cover, October 30, 1924 — 1924 “The Moor of Milan” · p.89 Read the full issue (204 pages) → 
Adventure Magazine, December 10, 1924 — 1924 “Under the Fleur-de-Lis” · p.121 Read the full issue (216 pages) → Appearances are extracted from each issue's own printed contents page; entries we can't read confidently are withheld rather than guessed.