C. Dunning Clark
2 appearances across 2 restored issues — every one readable in full, free.
Beadle's Dime Novels No. 138: Tim, the Scout — 1867 “Tim, the Scout; or, Caught in His Own Toils: A Tale of Tecumseh's Time” · p.5 Read the full issue (100 pages) → 
Beadle's Half Dime Library, Vol. 1, No. 8 — 1877 “The Yankee Rajah; or, The Fate of the Black Shereef” · p.5 Read the full issue (10 pages) → Appearances are extracted from each issue's own printed contents page; entries we can't read confidently are withheld rather than guessed.