1859 [age 8-9] 
From her childhood story "Minni Tighthand 
and Mrs. Dunley". Title page published in 
The Worlds and I.
1873 [age 22] 
From an autographed copy of Shells with 
owner's inscription dated "August 30, 1873"
1876 [age 25] 
From a letter written January 30, 1876.
1882 [age 32] 
From an autographed copy of Maurine and other Poems published by Jansen, McClurg & Co. in 1882.
1892 [age 41] 
From a letter written October 12, 1892.
1893 [age 42] 
From a note written January 29, 1893.
1894 [age 43]
From a note written August 1894.
1895 [age 44] 
From a letter written in 1895.
1897 [age 47] 
From a letter written December 4, 1897
1899 [age 50]
From an article published in The Household, January 1900.
1917 [age 66]
From a note written January 8, 1917.
1918 [age 67] 
From a letter written August 21, 1918.