Robert Cornelius's 1839 quarter-plate daguerreotype selt-portrait. This daguerrerotype is believed to be the earilest extant U.S. portrait photograph. (Fromt the Marian S. Carson Collection)
Robert Cornelius's 1839 quarter-plate daguerreotype selt-portrait. This daguerrerotype is believed to be the earilest extant U.S. portrait photograph. (Fromt the Marian S. Carson Collection)