[Letter of 1866 November 19]
[Letter of 1866 September 17]
[Letter of 1867 April 21]
[Letter of 1867 August 13]
[Letter of 1867 January 28]
[Letter of 1867 March 3]
[Letter of 1867 March 5]
[Letter of 1867 November 19]
[Letter of 1867 September 3]
[Letter of 1868 April 16]
[Letter of 1868 August 24]
[Letter of 1868 December 29]