THE ADVENTURES OF REX AND RINTY (1936)--a 12-chapter serial compilation

THE ADVENTURES OF REX AND RINTY begins on the island of Sujan, off the coast or eastern Africa, where guarded by jungles, roving beasts and the Sacred Guard, nestles a shrine to a sacred horse, the black Arabian Rex, the God-Horse of Sujan. High Priest Tanaga innocently allows to Americans, Mitchell and Wheeler see the sacred stallion and, with the aid of Martin, they steal the horse and bring it to the United States, where they sell it to Crawford, a wealthy, greedy polo-playing rancher. Crawford attempts to train Rex as a polo horse, but royal Rex (King of the Wild Horses) isn't having any of that, escapes and takes to the open road or, in this case, range. There he teams up with the vagabond dog, Rinty, and they avoid capture by Crawford and his henchmen Jones, Anderson and McDonald. Their activities attract the attention of polo-player Frank Bradley, who befriends the animals and takes them both back to the island of Sujan. Crawford follows and convinces the natives to turn against their God-Horse, and Rex is about to be burned as a sacrifice.