The Mystery of Lake Lethe

Bob Marston, a San Francisco socialite turned amateur detective is assigned to apprehend a gang of bootleggers.

A man and two women, suspected of stealing bonds, are traced to a country hotel. While Judith, one of the women, is out horseback riding, the other two, Walter and Vera, are arrested. When, during a storm, Judith is injured in a fall from her horse, Boone Pendleton comes to her rescue. Soon the river becomes impassable, and they are trapped in Boone's cabin, where the two fall in love.

Two men, one of them a villainous hypnotist, contend for the same woman, unaware that she suffers from dual personality disorder.

Old Silas Blackburn, a wealthy recluse, lives alone with his butler and his ward Katherine. One night, Katherine discovers Silas murdered in the room where three generations of Blackburns have mysteriously died. Silas' grandson Robert, whom Katherine loves, comes to visit the next day, suffering from amnesia.

Rosalind Joy (Helen Foster) is an heiress who has inherited a South Seas island known as Pleasure Island. A hidden cache of gold is allegedly buried on the island, which has several haunted structures. Rosalind's uncle, Spring Gilbert (Al Ferguson), wants the gold for himself and declares he will stop at nothing, not even the death of his niece, to get it. Rosalind, meanwhile, is befriended by Jerry Fitzjames (Jack Dougherty), a playwright. Unfortunately, Jerry has only recently escaped from a psychiatric hospital. Although he swears to protect Rosalind, she doubts Jerry's sanity. The two lovers race against Uncle Gilbert (who has set several traps for them) to find the treasure. In the end, Rosalind and Jerry are aided by the "Phantom Rider," a spectral horseman.

Winthrop Clavering a mystery writer, is continually ridiculed for the fiction of the crimes he depicts, so he decides to solve a case himself. To that end, he determines to find the slayer of Pedro Alvarez, who whispered before dying that his assailant was a woman. At the City Refuge for Homeless Girls, Clavering obtains the assistance of Margaret Holt, the sister of Victor Holt, the district attorney. Margaret, it is revealed, was abducted by Juanita, a member of a gang of white slavers led by Alvarez. After escaping from a brothel, Margaret became Alvarez' stenographer, hoping to gather secret information on his gang. While searching for evidence, Margaret was surprised by Alvarez, whom she killed. Finally, Clavering captures the gang, clears Margaret, and encourages her romance with cub reporter Jack Howell. This film is presumably lost.

In this story the hero is haunted by a beautiful young woman who tries to stab him to death with a knife. This fantasy recurs on each of his birthdays, becoming more and more real as the years go on. He leaves home to secure a place as groom, but arrives at his destination too late. Forced to retrace his steps, he seeks shelter in a little inn, forgetting that the hour of his birth is approaching. In the middle of the night he awakens, terrified with fright… Based on Wilkie Collins' novel “The Dream Woman”.

Louis and August Siever, the twins sons of a German father and American mother, are traveling in Europe when war breaks out. August joins the Kaiser's army, but Louis, a supporter of the United States, is practically made a prisoner in Berlin for a year while he tries to prove his American citizenship. After a violent confrontation with Louis, August steals his brother's passport and leaves for New York with Gerda Anderson, a German spy.

At the death of Count de Beaulieu, his daughter Jeanne learns that her father had been the arch-criminal known as The Phantom. The only other person who knew her father's identity was his lieutenant, Franz Leroux, who now demands that Jeanne marry him in return for his silence.

Police headquarters has been plagued by a series of robberies, culminating in the theft of a priceless necklace smuggled from Europe. The detectives are on the track of a gang led by master thief Ramon Mordant and his accomplice known as "the Face" because of his twisted and hideous countenance.

Lois Fox, upon whose shoulder is branded a Chinese idiograph resembling the letters "A. Y.," is rescued from a gang of Chinese ruffians by Brice Ferris. His servant Ming, in attempting to steal from her finger a ring that bears a mysterious green seal, is killed, and soon afterward a stranger named Strang arrives, also in search of the girl. Despite Brice's efforts to protect her, Lois is abducted and taken to the headquarters of Lao Wing, the leader of a secret Chinese society known as the Tong.

Guido, an artist, is obsessed with the desire for the death of Clavering, a rich man who has entered into a forced marriage with Margaret, the girl whom Guido loves. The thought accompanies him in his work, his sleep and fills his every moment. One night, he awakens from a dream in which he has murdered Clavering. The next morning, Clavering is found murdered and Guido labors under the uncanny feeling that he is the murderer. Hoping to relieve Guido's fears, Margaret induces him to paint the picture of his dream. Clavering's butler sees the painting of his dead master, and is so horror stricken that he confesses to murdering Clavering for his money.

Chaney plays two roles: mad scientist Arthur Lamb and Lamb's "experiment", known only as the Ape Man. This hideous creature was the result of Lamb's attempts to transplant animal glands into human beings. A lost film.

The Bar-C Mystery is a 1926 American silent Western 10 film serial directed by Robert F. Hill. Chapters: 1. A Heritage of Danger; 2. Perilous Paths; 3. The Midnight Raid; 4. Wheels of Doom; 5. Thundering Hoofs; 6. Against Desperate Odds; 7. Back from the Missing; 8. Fight for a Fortune; 9. The Wolf's Cunning; 10. A Six-Gun Wedding.

Feature version of the 1945 American serial film of the same name, composed for export only, never seen in the USA and now evidently a long-lost film.

In Dijon, Inspector Hanaud investigates Betty Harlowe after her uncle, Boris Waberski, accuses her of poisoning her wealthy aunt for an inheritance. While an initial autopsy finds nothing, Hanaud discovers the use of Strophanthus Hispidus—a rare, undetectable poison applied via an antique arrow. Amidst a flurry of "poison pen" letters and deception, Hanaud proves the murder occurred despite the lack of conventional medical evidence.

Wife of wealthy ladies' man Challis Wrandall, Sara, is called to a roadhouse to identify her husband's body and told that he was murdered by an unidentified woman. On her way home, Sara rescues a young woman who is about to drown herself. Believing the woman, Hetty Castleton, to be the murderer, Sara offers her employment in the Wrandall home as her companion. Because her husband and his family treated her so coldly during her married life, Sara seeks revenge by arranging a romance between her brother-in-law Leslie and Hetty, but the latter has fallen in love with artist Brandon Booth and refuses to marry young Wrandall. Sara threatens to expose the girl, but just then a detective appears and accuses Sara of the crime. Hetty confesses, explaining to the family that Challis had lured her to the inn and attacked her. The Wrandalls forgive her, and she leaves her home in Booth's company.

While touring India, noted English criminologist Richard Duvall saves the life of a Buddhist priest who rewards him with the presentation of a wonderful crystal globe. By gazing in it the priest demonstrates that Duvall can fall into a cataleptic state and his astral body is released and is free to roam at will. Shortly afterward he uses the orbs powers to help his lady love Grace Ellicott solve the murder of her aunt and restore her fortune.

Wealthy spinster, Rachel Innes rents a country house with her niece and nephew for the summer, only for a series of strange occurrences and a murder at the house's circular staircase to lead to shocking revelations about the home's owner and the family secrets within the house.

After serving fifteen years of a twenty-year prison term for embezzlement, Joe Moore is released early for good behavior. In New York, he finds Matthew Owens and James Horton, his former business associates, and demands that they pay what they owe him.