- CDET : Archdiocese of Detroit: Manuscripts
- CDET III-2-f to III-2-n Series : Calendared Documents
- CDET III-2-n to III-2-q Series : Uncalendared Letters
- CDET III-2-n/4.03 Letter : Burton Historical Collection with information on Rev. Louis Baroux
- CDET III-2-n/5.10 Letter : Catholic Church Extension Society to John O'Shea, Sacred Heart of Jesus Church
- CDET III-2-o/1.01 Letter : D. Dela Hailandiere to Bp. Lefevere, Bishop of Detroit, (French) 1844/0628 1844/0628
- CDET III-2-o/1.02 Letter : Bishop of Bardstown to Rev. Badin (French and Italian) 1833/0409
- CDET III-2-o/1.03 Letter : Bishop of Ohio and Michigan to United States Secretary of War 1831/1126
- CDET III-2-o/1.04 Letter : Bishop of Ohio and Michigan to United States Secretary of War 1831/07
- CDET III-2-o/1.05 Letter : Bishop Edward Fenwick of Michigan re: new church (French) 1829/0702
- CDET III-2-o/1.06 Letter : Italian Cardinal to Rev. Peter Paul Lefebvre of Detroit (French) 1843/0408
- CDET III-2-o/1.07 Document : One-page example of Annual Report of State of the Schools
- CDET III-2-o/1.08 Document : John C. Calhoun: 1 page circular regarding Indian Schools 1819/0903
- CDET III-2-o/1.09 Document : Form for applications to create Indian schools, with two circulars from Secretary of War John C. Calhoun 1820/0229
- CDET III-2-o/1.00 Letter : Crawford of the Office of Indian Affairs to Mr. Santetti 1843/0704
- CDET III-2-o/1.01 Letter : Hartly Crawford of the Office of Indian Affairs to the Superintendent of Schools 1843/0725
- CDET III-2-o/1.12 Letter : Robert Stuart, Superintendent of Indian Affairs to Rev. P.P. Lefebvre 1844/0403
- CDET III-2-o/1.13 Letter : J.K.P. to President of the United States 1846/0309
- CDET III-2-o/1.14 Letter : Jas. Shields, Land Office Commissioner, to Henry R. Schoolcraft, Esp., State Indian Agent 1846/0312
- CDET III-2-o/1.15 Letter : P.P. Lefebvre to Hon. Lucius Lyon 1844/0130
- CDET III-2-o/1.16 Letter : Lucius Lyon to P.P. Lefebvre 1844/0412
- CDET III-2-o/1.17 Letter : Fr. Sorin to ? 1853/0824
- CDET III-2-o/1.18 Letter : Fr. Sorin to J.M.J. 1854/0218
- CDET III-2-o/1.20 Letter : William McKintosh to Vincennes in relation to 400 acres of land to Rev. Gabriel Richard 1805/0622
- CDET III-2-o/1.20 Letter : William McKintosh to Vincennes in relation to 400 acres of land to Rev. Gabriel Richard 1816/1123
- CDET III-2-o/1.21 Letter : Edward Fenwick to Gabriel Richard 1829/0706
- CDET III-2-o/1.23 Letter : to Hon. John Sloane, chairman of committee of Elections - last page missing
- CDET III-2-p/1.03 Letter : Bp. Baraga to his sister, Amalia (Slovenian) - photocopy 1853/0613
- CDET III-2-p/1.04 Document : Cover page for Bp. Baraga's letter, by St. Mary's Seminary archivist 1964/0321
- CDET III-2-p/1.05 Document : Filmpieces and letter to St. Mary's Seminary
- CDET III-2-p/1.06 Letter : Bremen to St. Mary's Seminary (German)
- CDET III-2-o/2.19 Letter : Leopoldus Maximilianos, archbishop of Vienna, giving Bishop Rese, vicar-general of Cincinnati faculty to say mass while visiting Europe (Latin) 1827/0331
- CDET III-2-o/2.20 Letter : Archbishop Damascen to Bp. Rese (Latin) 1823/
- CDET III-2-o/2.21 Letter : Eduard Fenwick of Cincinnati to Bp. Rese 1827/0113
- CDET III-2-o/22 Letter : Maurus Cappelari to Bp. Rese 1828/1224
- CDET III-2-p/1.10 Letter : Transcript of letter from Bishop Baraga to Editor of Irish newspaper "The Tablet" appealing for priests to go to Michigan 1853/1209
- CDET III-2-p/2.01 Letter : Bp. Baraga to Amalia Gressel (sister?) 1819/0714
- CDET III-2-p/2.01 Letter : Bp. Baraga to Archbishop of Laiback 1821/1022
- CDET III-2-p/2.01 Letter : Bp. Baraga to Amalia Gressel (sister?) 1825/0108
- CDET III-2-p/2.01 Letter : Bp. Baraga to Archbishop of Laiback 1827/0104
- CDET III-2-p/2.01 Letter : Carniola, Objavil V. Staska 1913
- CDET III-2-p/2.01 Letter : Bp. Baraga to Archbishop of Laiback 1829/0810
- CDET III-2-p/2.01 Letter : Bp. Baraga to Archbishop of Laiback 1829/0825
- CDET III-2-p/2.01 Letter : Bp. Baraga to Archbishop of Laiback 1829/1008
- CDET III-2-p/2.01 Letter : Bp. Baraga to Archbishop of Laiback 1830/0809
- CDET III-2-p/2.01 Letter : Bp. Baraga to Archbishop of Laiback 1829/1108
- CDET III-2-p/2.01 Letter : Bp. Baraga to Archbishop of Laiback 1829
- CDET III-2-p/2.01 Letter : Bp. Baraga to Archbishop of Laiback 1830/0725
- CDET III-2-p/2.01 Letter : Bp. Baraga to Archbishop of Laiback 1830
- CDET III-2-p/2.01 Letter : Bp. Baraga to Augustin Sluga 1830/0906
- CDET III-2-p/2.01 Letter : Bp. Baraga to Amalia Gressel (sister?) 1830/1231
- CDET III-2-p/2.01 Letter : Bp. Baraga to Amalia Gressel (sister?) 1831/0602
- CDET III-2-p/2.01 Letter : Bp. Baraga to Amalia Gressel (sister?) 1831/0121
- CDET III-2-p/2.01 Letter : Bp. Baraga to Amalia Gressel (sister?) 1831/0102
- CDET III-2-p/2.01 Letter : Bp. Baraga to Amalia Gressel (sister?) 1831/0102
- CDET III-2-p/2.01 Letter : Augustin Sluga to ? 1832/0725
- CDET III-2-p/2.01 Letter : Bp. Baraga to Amalia Gressel (sister?) 1833/0629
- CDET III-2-p/2.01 Letter : Bp. Baraga to Amalia Gressel (sister?) 1833/0304
- CDET III-2-p/2.01 Letter : Bp. Baraga to Amalia Gressel (sister?) 1833/0729
- CDET III-2-p/2.01 Letter : Bp. Baraga to Amalia Gressel (sister?) 1833/0825
- CDET III-2-p/2.01 Letter : Bp. Baraga to Director of Leopold Society 1833/0825
- CDET III-2-p/2.01 Letter : Bp. Baraga to ? 1834/
- CDET III-2-p/2.01 Letter : Bp. Baraga to Amalia Gressel (sister?) 1835/0804
- CDET III-2-p/2.01 Letter : Bp. Baraga to Amalia Gressel (sister?) 1835/0922
- CDET III-2-p/3 Subseries : American Fur Company Letters, all transcribed
- CDET III-2-p/3.01 Letter : Rev. Richard Franchere to Ramsey Crooks 1835/0929
- CDET III-2-p/3.02 Letter : Ramsey Crooks to Rev. Frederick Baraga 1836/0604
- CDET III-2-p/3.03 Letter : Ramsey Crooks to Samuel Abbot 1837/0808
- CDET III-2-p/3.04 Letter : Ramsey Crooks to Bp. Baraga 1838/0505
- CDET III-2-p/3.05 Letter : Ramsey Crooks to Bp. Baraga 1838/0518
- CDET III-2-p/3.06 Letter : Loisson to Ramsey Crooks (French) 1838/1024
- CDET III-2-p/3.07 Letter : Winthrop Cunningham to Ramsey Crooks 1838/1207
- CDET III-2-p/3.08 Letter : John B. Whetten to Winthrop Cunningham 1838/1210
- CDET III-2-p/3.09 Letter : J. P. Suppatschitsch to Crooks (French) 1839/0419
- CDET III-2-p/3.10 Letter : Loisson to Crooks 1839/0517
- CDET III-2-p/3.11 Letter : Crooks to Baraga 1839/0601
- CDET III-2-p/3.12 Letter : Baraga to Crooks 1839/0706
- CDET III-2-p/3.13 Letter : Crooks to Baraga 1839/1231
- CDET III-2-p/3.14 Letter : Loisson to Crooks (French) 1839/1125
- CDET III-2-p/3.15 Letter : Crooks to Loisson 1839/1231
- CDET III-2-p/3.16 Letter : Baraga to Crooks 1840/0306
- CDET III-2-p/3.17 Letter : Baraga to Crooks 1840/0502
- CDET III-2-p/3.18 Letter : Antoinette Hoeffern to Crooks 1840/0526
- CDET III-2-p/3.19 Letter : Baraga to Crooks 1840/0526
- CDET III-2-p/3.20 Letter : Loisson to Crooks (French) 1840/0701
- CDET III-2-p/3.21 Letter : Baraga to Crooks 1840/0724
- CDET III-2-p/3.22 Letter : Crooks to Baraga 1840/0817
- CDET III-2-p/3.23 Letter : Baraga to Crooks 1840/0821
- CDET III-2-p/3.24 Letter : J.P. Suppantschisch to Crooks (French) 1840/0904
- CDET III-2-p/3.25 Letter : Crooks to Baraga 1840/0905
- CDET III-2-p/3.26 Letter : Baraga to Crooks 1840/0914
- CDET III-2-p/3.27 Letter : Loisson to Crooks (French) 1840/0922
- CDET III-2-p/3.28 Letter : Baraga to Crooks 1840/0926
- CDET III-2-p/3.29 Letter : Crooks to Baraga 1840/0929
- CDET III-2-p/3.30 Letter : Baraga to Crooks 1840/1001
- CDET III-2-p/3.31 Letter : Crooks to Suppantschisch 1840/1020
- CDET III-2-p/3.32 Letter : Crooks to Antoinette Hoeffern 1840/1020
- CDET III-2-p/3.33 Letter : Suppantschisch to Crooks (French) 1841/0110
- CDET III-2-p/3.34 Letter : Antoinette Hoeffern to Crooks 1840/1026