i. 17 April 1842 - Bruyères en Vosges - Cryptograms he had published with Prof. Nestler. Publications. Discusses specimens from the Canaries. Dr. Montagne, Barker Webb and Sabin Berthelot. (French).
ii. 16 January 1851 - Bruyères en Vosges - Acknowledges ferns. Ferns from Mr. Gardner not received. Has bought Cumming's ferns. Publications. (French).
(Note from W.P. 7 July 1851 Gardner's death. Expects fine ferns from New Zealand, etc.).