Frank Merrill, a stuntman on Lincoln's last Tarzan production, replaced an injured Joe Bonomo
in the serial, Tarzan The Mighty (1928) and followed that up with Tarzan The Tiger (1929).
"Tiger" had some sound effects but no dialogue; Merrill gave the first "tarzan yell" heard on the motion picture screen.

TARZAN THE MIGHTY (1928)
Cast: Frank Merrill (Tarzan), Natalie Kingston (Mary Trevor), Bobby Nelson (Bobby Trevor, Mary's younger brother), Al Ferguson, Lorimer Johnston.
Directed by Jack Nelson and Ray Taylor; screenplay by Ian McClosky Heath and Jack Nelson based on characters created by Edgar Rice Burroughs.
PLOT: Mary and Bobby Trevor are castaways befriended by Tarzan. When Lord arrives, looking for the family heir, Black John tries to fill that role

and marry Mary in England. Tarzan shows up and marries her instead.

Chapter titles:
1. The Terror of Tarzan
2. The Love Call
3. The Call of the Jungle
4. The Lion's Leap
5. Flames of Hate
6. The Fiery Pit
7. The Leopard's Lair
8. The Jungle Traitor
9. Lost in the Jungle
10 The Jaws of Death
11 A Thief in the Night
12 The Enemy of Tarzan
13 Perilous Paths
14 Facing Death
15 The Reckoning

Frank Merrill's Tarzan the Tiger on next page...