Firmin-Eugène Le Dien (1817 - 1865) Italy, 1852 - 1853. Study of a Tree in the Poussin Valley, near Rome. Salt paper print from a waxed paper negative, mounted on cardboard. Numbered "33" in the negative lower right. 32 x 23.5 cm The same print was presented at the exhibition devoted to Gustave Le Gray at the BnF in 2002 . (Gustave Le Gray, 1820 - 1884, Paris, Bibliothèque nationale de France, 2002, no. 218.) Firmin-Eugène Le Dien (1817-1865) Italy, 1852-1853. Study of a tree in the Poussin Valley, near Rome. Salt print, from paper negative, mounted on cardboard. Number "33" in the negative. 32 x 23.5 cm