Murder at Monte Carlo

Captain "Wolf" Larsen, the absolute master of a seal schooner, is a mystic and philosopher, though he rules his men with an iron hand. On a ferry going from San Francisco to Oakland, Van Weyden, a critic, and Maud Brewster, a novelist, meet in masquerade costumes and are forced overboard when their boat collides with a steamer. Humphrey, then Maud, are picked up by Larsen's crew. Because of her costume, Maud is taken for a boy and placed in the custody of Mugridge, the cook, who attempts to attack her upon discovering her identity. Larsen takes her under his protection and decides to marry her; but as the ceremony begins, the crew mutinies, and Larsen is stricken with blindness as he faces the rebels. The ship is set afire, and though Humphrey and Maud are rescued by another steamer, Larsen, deserted by his crew, refuses to quit his ship and is enveloped in flames.

A group of seven people find themselves on a ship in the middle of an endless ocean, with no recollection of how they got there. (lost film)

Danger Street (1928)

A melodrama in which Jan and Clarry are initially rivals, but then find that they cannot live without each other.

Amy and Matthew Dale separate and they place their young son, Matthew Jr., in a London boarding school. The boy grows up without knowing his parents, and is taunted by his schoolmates, who doubt the legitimacy of his childhood. By the time he is 20, Matt wants to find out about his parentage, so he travels to Paris, leaving behind his sweetheart, Margo.

Tropical Love is a 1921 Romance film

A young girl is reared on a desert island by natives and led to believe that she is a goddess. One day an outsider comes to the island, and persuades her to accompany him to preach about the kindness and love she has experienced. She agrees, but she's soon confronted by the problems and travails of the "outside" world.

Unable to support her baby boy, Grace Devereaux, a widow, leaves him at an orphan asylum.

Bank robbers and killers cause mayhem in a small western town.

After her father dies, Chloe, played by Edith Storey, is left alone in the world. She is discovered and taken home to their cave by brothers Dagban and Eric, who vie for her affection in an allegory about “brain vs. brawn.” When “Dagban threatens to do her bodily harm unless she accedes to his intentions” Eric beats up his brother to protect Chloe, and then subsequently leaves the cave he calls home to avoid further conflict. By this point, he has won Chloe’s affection with his kindness and love, and she decides to follow him and “together they continue their journey, seeking happiness in the land beyond the horizon, which joins earth with heaven.” (https://100yearoldmovies.wordpress.com/2012/04/16/the-cave-man-vitagraph/)