[Letter of 1879 March 7]
[Letter of 1876 February 1]
[Letter of 1873 May 6]
[Letter of 1873 September 23]
[Letter of 1873 June 30]
[Letter of 1866 January 1]
[Letter of 1873 August 6]
[Letter of 1873 August 11]
[Letter of 1868 March 5]
[Letter of 1873 October 9]
[Letter of 1875 October 12]
[Letter of 1873 October 3]