Henry Leverage
3 appearances across 3 restored issues — every one readable in full, free.
Argosy All-Story Weekly, Vol. 123, No. 4 — 1920 “McMasters Folly” · p.532 Read the full issue (200 pages) → 
Argosy All-Story Weekly — "The Purple Limited" — 1920 “The Purple Limited” (serial) Read the full issue (208 pages) → 
Argosy All-Story Weekly, November 13, 1920 — 1920 “Who's Boss?” · p.332 Read the full issue (164 pages) → Appearances are extracted from each issue's own printed contents page; entries we can't read confidently are withheld rather than guessed.