Kenneth Gilbert
3 appearances across 3 restored issues — every one readable in full, free.
Adventure Magazine Cover — 1921 “The People of the Fourth Dimension” · p.85 Read the full issue (200 pages) → 
Adventure, January 20, 1922 — 1922 “Captain Dingle” Read the full issue (196 pages) → 
Action Stories, September 1926 — 1926 “The Menace of Mastodon Valley” · p.20 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.