Robert Sidney Bowen
4 appearances across 4 restored issues — every one readable in full, free.
Dare-Devil Aces, April 1937 — 1937 “Scrambled Aces” · p.56 Read the full issue (117 pages) → 
Dare-Devil Aces, January 1938 — 1938 “THE DEAD FLY ON” · p.77 Read the full issue (116 pages) → 
Dare-Devil Aces, Vol. 21, No. 3 — 1939 “Dead Man's Patrol” · p.36 Read the full issue (117 pages) → 
Black Book Detective, October 1947 — 1947 “PEAR OR PONE” · p.72 Read the full issue (116 pages) → Appearances are extracted from each issue's own printed contents page; entries we can't read confidently are withheld rather than guessed.