This is a singular self-portrait of somebody who knew Nicéphore Niepce. We can see somebody who saw him. Very interested by his invention, Petiot made two attempts, primarily in 1841 with the help of Richebourg, then twelve years later with the directions of Ferrier and Baldus. The identification was confused for fifty years, outlined in the right direction after an advice from Mr. Lesage, getting close when some peper portraits of an older Mr Petiot became accessible. In a logical way, Petiot-Groffier had followed Richebourg instructions after receiving his daguerreian selfportrait, eyes closed.
