Loring Brent
4 appearances across 4 restored issues — every one readable in full, free.
Argosy and Railroad Man's Magazine, Vol. 107 No. 3 — 1919 “The Ship That Crumbled” (serial) · p.434 Read the full issue (196 pages) → 
Argosy and Railroad Man's Magazine — 1919 “IT WON'T HAPPEN AGAIN” Read the full issue (196 pages) → 
Argosy All-Story Weekly, Vol. 189, No. 4 — 1927 “The Bully of Biscayne Bay” · p.498 Read the full issue (180 pages) → 
Argosy All-Story Weekly — "Sea Marauders" — 1928 “The Scandal on Kitikat Key” (serial) · p.491 Read the full issue (156 pages) → Appearances are extracted from each issue's own printed contents page; entries we can't read confidently are withheld rather than guessed.