Letter
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| February 26, 0000 | November 1, 0000 | April 14, 1915 |
| May 5, 1915 | May 14, 1915 | May 28, 1915 |
| May 29, 1915 | July 12, 1915 | August 5, 1915 |
| September 10, 1915 | October 9, 1915 | October 19, 1915 |
| February 3, 1916 | June 8, 1916 | June 11, 1916 |
| June 20, 1916 | June 25, 1916 | July 1, 1916 |
| September 2, 1916 | September 8, 1916 | January 3, 1917 |
| February 6, 1917 | May 1, 1917 | May 17, 1917 |
| June 9, 1917 | June 16, 1917 | June 21, 1917 |
| September 21, 1917 | October 3, 1917 | December 16, 1917 |
| April 29, 1918 | May 11, 1918 | September 15, 1918 |
| October 23, 1918 | nd |