1899
| Date | Vol / Letter / Page | Written From | Written to |
| Early, 99 | 9 / CXXX / 111 | Sister Nivedita | |
| Early, 99 | 9 / CXXXI / 111 | Sister Nivedita | |
| January 3, 99 | 5 / LXXXIX / 144 | Deoghar | Bose, Mrinalini |
| January 26, 99 | 9 / CXXXII / 112 | Belur Math | Sister Christine |
| February 2, 99 | 5 / XC / 148 | Belur Math | MacLeod, Josephine |
| March (../?), 99 | 9 / CXXXIII / 113 | Swami Brahmananda | |
| March (../?), 99 | 9 / CXXXIV / 113 | Belur Math | Swami Swarupananda |
| March 2, 99 | 9 / CXXXV / 114 | Belur Math | Sister Nivedita |
| March 6, 99 | 9 / CXXXVI / 461 | Belur Math | Ghosh, Ishwar Chandra |
| March 16, 99 | 8 / CXXXVI / 461 | Belur Math | Hale, Mary |
| April 11, 99 | 6 / CXLVI / 418 | Belur Math | |
| April 16, 99 | 7 / XLIII / 513 | Belur Math | Ghoshal, Sarala |
| April 25, 99 | 9 / CXXXVII / 115 | Belur Math | Sister Nivedita |
| May 10, 99 | 9 / CXXXVIII / 115 | Belur Math | Sister Christine |
| June 14, 99 | 5 / XCI / 149 | Alambazar Math | Maharaja of Khetri |
| June 21, 99 | 9 / CXXXIX / 116 | Calcutta | MacLeod, Josephine |
| July 14, 99 | 8 / CXXXVII / 463 | Port Said | Sturdy, Mr. E. T. |
| July 14, 99 | 9 / CXL / 116 | Suez | Sister Christine |
| July 23, 99 | 9 / CXLI / 117 | Marseilles | Sister Christine |
| August 3, 99 | 8 / CXXXVIII / 464 | Wimbledon | MacLeod, Josephine |
| August 6, 99 | 9 / CXLIII / 118 | Wimbledon | Bull, Mrs. Ole |
| August, 99 | 8 / CXXXIX / 466 | Wimbledon | Halboister, Marie |
| August 10, 99 | 8 / CXL* / 468 | London | Swami Brahmananda |
| August 31, 99 | 9 / CXLIV / 119 | New York | McKindley, Isabelle |
| September 2, 99 | 5 / XCII / 150 | Ridgely Manor | |
| September 4, 99 | 6 / CXLVII / 418 | Ridgely Manor | Bull, Mrs. Ole |
| September 4, 99 | 8 / CXLI / 470 | Ridgely Manor | Bull, Mrs. Ole |
| September 14, 99 | 8 / CXLII / 470 | Ridgely Manor | Sturdy, Mr. E. T. |
| September 20, 99 | 9 / CXLV / 120 | Ridgely Manor | Sister Christine |
| September, 99 | 8 / CXLIII / 472 | Ridgely Manor | Hale, Mary |
| October 3, 99 | 8 / CXLIV / 475 | Ridgely Manor | Hale, Mary |
| October 5, 99 | 9 / CXLVI / 121 | Ridgely Manor | Hale, Mrs. G. W. |
| October 23, 99 | 9 / CXLVII / 122 | New York | Hale, Mrs. G. W. |
| October 25, 99 | 9 / CXLVIII / 123 | New York | Sister Christine |
| October 30, 99 | 8 / CXLV / 475 | Ridgely Manor | Hale, Mary |
| October 30, 99 | 9 / CXLIX / 123 | New York | Sister Christine |
| 8 / CXLVI / 478 | Ridgely Manor | Sturdy, Mr. E. T. | |
| November 1, 99 | 6 / CXLVIII / 419 | Ridgely Manor | Sister Nivedita |
| November 4, 99 | 9 / CL / 124 | New York | Sister Christine |
| November 10, 99 | 9 / CLI / 124 | New York | Sister Christine |
| November 12, 99 | 9 / CLII / 125 | New York | Sister Christine |
| November 12, 99 | 9 / CLIII / 126 | New York | Bull, Mrs. Ole |
| November 15, 99 | 8 / CXLVII / 479 | New York | Bull, Mrs. Ole |
| November 15, 99 | 6 / CXLIX / 419 | New York | Sister Nivedita |
| November 20, 99 | 8 / CXLVIII* / 480 | New York | Swami Brahmananda |
| November 20, 99 | 8 / CXLIX / 482 | New York | Hale, Mary |
| November 21, 99 | 8 / CL / 482 | New York | Swami Brahmananda |
| November 21, 99 | 9 / CLIV / 127 | New York | Sister Christine |
| November, 99 | 7 / XLIV / 515 | New York | Sturdy, Mr. E. T. |
| November 26, 99 | 7 / XLV / 519 | Chicago | Leggett, Mrs. Francis |
| November 30, 99 | 7 / XLVI / 520 | Chicago | Leggett, Mrs. Francis |
| November 30, 99 | 9 / CLV / 127 | Chicago | Bull, Mrs. Ole |
| December 1, 99 | 9 / CLVI / 128 | California Limited | Hale, Mrs. G. W. |
| December 2, 99 | 9 / CLVII / 128 | California Limited | Sister Nivedita |
| December 6, 99 | 7 / XLVII / 520 | Los Angeles | Sister Nivedita |
| December 6, 99 | 9 / CLVIII / 129 | Los Angeles | Hale, Mrs. G. W. |
| December 9, 99 | 9 / CLIX / 130 | Los Angeles | Sister Christine |
| December 12, 99 | 6 / CL / 419 | Bull, Mrs. Ole | |
| December 13, 99 | 9 / CLX / 131 | Swami Brahmananda | |
| December 22, 99 | 8 / CLI / 483 | Bull, Mrs. Ole | |
| December 23, 99 | 6 / CLI / 421 | Los Angeles | Sister Nivedita |
| December 27, 99 | 8 / CLII / 485 | Los Angeles | Bull, Mrs. Ole |
| December 27, 99 | 8 / CLIII / 487 | Los Angeles | Hale, Mary |
| December 27, 99 | 9 / CLXI / 131 | Los Angeles | Sister Christine |