Rare Half Plate Daguerreotype of an Identified California Miners Grave.

Incredibly rare half plate daguerreotype of an identified California miners grave. Three men stand beside a tombstone, one with a shovel, which is surrounded by a picket fence. An open cage stands behind the tombstone. The tombstone reads “In memory of. Chas Carpenter born in Dudley mass died October 15, 1853 age 19 years.” a nearly identical image, but featuring just two of the men at the gravesite is in the collection of the Metropolitan Museum of art and was featured in their 1999 spring bulletin. The condition is sadly lacking. A few light scratches are of no consequence. The lower third of the plate is dark and indistinct. This could be due to a faulty plate or to improper exposure. Fortunately, the important central part of the image with the scene is bold. Every letter on the stone is clear as are the clothes and facial expressions of his friends. This image is housed in a half plate go to Gutta percha frame. 
Charles Carpenter Jr. was born in 1834-35 in Dudley, Massachusetts and had a twin sister named Polly. He was buried in Yerba Buena Cementary in modern San Francisco. The cemetery was later destroyed in an effort to expand the city and is now located under the present day San Francisco City Hall. Attached you’ll find the San Francisco cemetery records from 1848-1863 which lists his name on the bottom of page 61. Additionally, I noticed the image from the MET has a gravestone at the bottom of the shovel the man is holding in the center image that says “2426.” In the same document you’ll find that this is the grave of Melechior Naef of Switzerland who also died in 1853.
https://legacy.sfgenealogy.org/sf/cemetery/sf_cemetery_records.pdf