The king of the jungle (1927)

Elmo Lincoln is a rugged jungle hero safeguarding a vulnerable heroine. They faced escalating perils in the untamed wilderness, including rampaging elephants, ferocious lions, massive apes, and cunning villains in this 10 episode serial. Chapters: "The Great Tragedy", "The Elephant Avenger", "Battling for Her Life", "Into the Lion's Jaws", "The Striped Terror", "Gripped by the Death Vice", "The Slinking Demons", "The Giant Ape Strikes", "No Escape."