[Letter of 1867 March 5]
[Letter of 1866 July 24]
[Letter of 1866 June 23]
[Letter of August 18]
[Letter of 1867 August 13]
[Letter of 1876 March 6]
[Letter of 1869 November 27]
[Letter of 1867 November 19]
[Letter of 1868 March 2]
[Letter of 1868 May 1]
[Letter of 1878 July 27]
[Letter of 1879 March 7]