John M. Eckfeldt
Son of George Eckfeldt. Married to Sally Shannon in 1860. They had six children. Chief coiner at the San Fransicso Mint 1854 to 1862. Melter and refiner in 1874.
He shot himself due to apparent depression and overwork at the Mint.
In 1891 house movers discovered a wooden box under the floor of a house previously owned by John Eckfeldt. It contained gold believed to have been stolen from the mint.Source credit: Pete Smith, American Numismatic Biographies