This accrual adds significantly to the material already acquired relating to Catharine Hailer Breithaupt. The original fonds contains a trip diary for the second half of her first trip to Germany; this accession completes the account with the diary for the first half.

The original fonds contains a few documents and material relating to the estate of Catharine Breithaupt; this accession documents her life and activities with correspondence recieved from 1852 until her death in 1910, with some gaps.

Our knowledge of Catharine's life and activities is greatly enlarged by the presence in this accrual of correspondence written to others, to her husband Louis Breithaupt, to her son Albert Liborius Breithaupt and to her grandson Frederick. These letters are described in the correspondence series of the individuals who received the letters. Unlike her husband Louis Breithaupt, who writes in both English and German, Catharine writes only in German.

More records relating to the Jacob Wagner family can be found in the Wagner Hailer Family fonds and in the original Breithaupt Hewetson Clark family fonds. Jacob Wagner married Margaret Hailer, sister of Catharine Hailer. Their son, Louis Henry, was brought up in Louis and Catharine Breithaupt's household. The original fonds contains diaries he kept as a child and young adult; this accession contains correspondence from him to his aunt Catharine and to his first cousin Albert.