This untitled painting, watercolor, pen and ink, approximately 1.5 by 2.5 feet, is said to be in the Livermore area. It is quite detailed and shows the buildings, the vineyards and Chinese picking grapes. It is signed in the lower right corner with a very small written signature. It is signed, "L. Trousset." It was sold to an unknown buyer on March 16, 2006 from the Argonaut Book Shop in San Francisco, CA.
Before that, the painting was purchased in San Francisco from a woman who had it on her wall for many, many years.
As to the provenance prior to that, the only clue is a penciled note on the back of the picture by an early picture framer who stated, "Mr. Freudenstein. Trim frame to fit the picture." Freudenstein was probably the prior owner.
Leon was known to be in northern California from 1875-1877. He could have returned there during his "missing years" of 1888-1894.