Frederick Dewey
3 appearances across 3 restored issues — every one readable in full, free.
Spanish Jack — 1876 “Spanish Jack, The Mountain Bandit; or, The Pledge of Life” · p.5 Read the full issue (99 pages) → 
The Phantom Tracker — 1876 “The Phantom Tracker; or, The Prisoner of the Hill Cave” (serial) · p.3 Read the full issue (100 pages) → 
Beadle's Half Dime Library No. 478 — 1886 “Apache Jack' White Trail” (serial) · p.1 Read the full issue (16 pages) → Appearances are extracted from each issue's own printed contents page; entries we can't read confidently are withheld rather than guessed.