Douglas Oliver
3 appearances across 3 restored issues — every one readable in full, free.
Adventure Magazine Cover, October 30, 1924 — 1924 “Tub Tobin Repeats” · p.160 Read the full issue (204 pages) → 
Adventure Magazine Cover, March 20, 1925 — 1925 “Fowl Tactics” · p.127 Read the full issue (212 pages) → 
Action Stories, September 1926 — 1926 “All Clear” Read the full issue (148 pages) → Appearances are extracted from each issue's own printed contents page; entries we can't read confidently are withheld rather than guessed.