These three bound spiritual diaries "Ad majorem Dei gloriam Diarium" record Schlechter's religious practices and beliefs from 1883 to 1916 and are organized chronologically.

Diary 1: Dated at Florissant, St. Stanislaus: 1 January 1883 - 25 May 1889

Diary 2: 1 January 1884 - 24 May 1891

Diary 3: 1 January 1901 - 28 April 1916

This "Private Account Book for the Spiritual Director” of “Young Men’s Sodality, St. Joseph's Church" contains financial records for the organization, including funeral funds, contributions, library acquisitions, gas bills, and the Casino Club expenses. The notebook also contains sermon notes "De Verbo Incarnato" and lecture notes that have been crossed out.

This notebook contains meeting minutes for the "German Academy", a German Jesuit organization and its meetings at Saint Louis University and other local areas (29 September 1884 - 28 October 1884).