The 1952 film "The Treasure of Lost Canyon" is loosely based on Robert Louis Stevenson's 1883 short story "The Treasure of Franchard".
In the late 1880's Northern California young boy David is orphaned and is taken in by a medicine show man. Later David is adopted by Homer 'Doc' Brown, a local man who is married to Samuella. They live near the (real) Burney Falls and Homer takes to boy to see the falls and tells him that a local bandit hid his treasure in the area. David and Homer find the treasure, stored in the traditional pirate treasure chest, which includes coins. A medallion which has always been in David's possession becomes an important clue to his identity.

Baby David is in a carriage wearing a medallion.

David is taken in by a medicine show proprietor and then by Homer 'Doc' Brown. Homer lives in a house in the country.

Homer is married to Samuella.

Homer takes David to a view of the local mountain.

Homer tells David that he doesn't like living in cities, especially the "sinful" San Francisco.
Later he takes David to Burney Falls.

The film credits the real McArthur-Burney Falls State Park for these scenes. David takes a rope and descends the rocks near the waterfall.

He finds a cave and calls to Homer to come down.

The pair spot the treasure chest which contains gold mining pans.

The right pan has what appears to be gold coins, no doubt prop or imitation coins. The pair head to town where Homer purchases some expensive items including presents for his wife. The word gets around town that the pair have money. Some local crooks attempt to "adopt" David to get the money and a court hearing is held. David becomes wary of the publicity and takes the chest back to Burney Falls. A local man gives Homer a medallion.

Homer compars his medallion with David's medallion.

He makes a surprising discovery.

Homer is proved to be David's uncle.
The pair return to Burney Falls to retrieve the chest.

The chest comes out of the water.

William Powell as Homer 'Doc' Brown
Julie Adams as Myra Wade
Charles Drake as Jim Anderson
Rosemary DeCamp as Samuella
Tommy Ivo as David
Director: Ted Tetzlaff
Writers: Brainerd Duffield, Emerson Crocker
Based on Robert Louis Stevenson's 1883 short story "The Treasure of Franchard".