- MLEO 4/045 Recipient : Chancery of Linz 1834/0905
- MLEO 4/046 Author : Ziegler, Gregorius Thomas (Bishop of Linz) 1834/0828
- MLEO 4/046 Recipient : Leopoldine Society Board of Directors 1834/0828
- MLEO 4/047 Document : Article on German Catholics for "Catholic Columbian" 1916/0414
- MLEO 4/048 Author : Gundel, Joseph (Father-Superior Generalis-Rome) 1939/0617
- MLEO 4/048 Recipient : Thauren, Johannes (Father-St.Gabriel) 1939/0617
- MLEO 4/049 Author : Petit, Didier (Father-Lyon) 1827/0902
- MLEO 4/049 Recipient : Rese, Frederick (Father-American Missionary-in Rome) 1827/0902
- MLEO 4/050 Author : Sacred Congregation of the Propaganda (Rome) 1827/0917
- MLEO 4/050 Recipient : Capaccini, Francesco (Substitute of the Secretary) 1827/0917
- MLEO 4/051 Author : Sacred Congregation of the Propaganda (Rome) 1828/0102
- MLEO 4/051 Recipient : Ambassador of France (Rome) 1828/0102
- MLEO 4/052 Author : Sacred Congregation of the Propaganda (Rome) 1828/0529
- MLEO 4/052 Recipient : Rese, Frederick (Very Rev Fr-Vicar Gen of Cincinnati) 1828/0529
- MLEO 4/053 Author : Sacred Congregation of the Propaganda (Rome) 1828/1004
- MLEO 4/053 Recipient : Spinola, Ugo Pietro (Abp of Jeba-Apost Nunt of Vienna) 1828/1004
- MLEO 4/054 Author : Sacred Congregation of the Propaganda (Rome) 1828/1121
- MLEO 4/054 Recipient : Bernetti, Tommaso (Secretary of State-Rome) 1828/1121
- MLEO 4/055 Author : Sacred Congregation of the Propaganda (Rome) 1829/0117
- MLEO 4/055 Recipient : Bernetti, Tommaso (Cardinal-Secretary of State-Rome) 1829/0117
- MLEO 4/056 Author : Sacred Congregation of the Propaganda (Rome) 1829/0214
- MLEO 4/056 Recipient : Spinola, Ugo Pietro (Msgr-Abp of Jeba-Apost Nuncio) 1829/0214
- MLEO 4/057 Author : Sacred Congregation of the Propaganda (Rome) 1829/0214
- MLEO 4/057 Recipient : Rese, Frederick (Father-Vicar General of Cincinnati) 1829/0214
- MLEO 4/058 Author : Sacred Congregation of the Propaganda (Rome) 1838/0708
- MLEO 4/058 Recipient : Asquini (Msgr-Abp of Jaso-Apostolic Nuntio in Naples) 1838/0708
- MLEO 4/059 Author : Sacred Congregation of the Propaganda (Rome) 1838/0714
- MLEO 4/059 Recipient : Rese, Frederick (Bishop of Detroit) 1838/0714
- MLEO 4/060 Author : Verna (Prsdnt-Assoc'tn of Propagation of Faith-Lyon) 1838/0714
- MLEO 4/060 Recipient : Bernetti, Tommaso (Cardinal) 1838/0714
- MLEO 4/061 Author : Sacred Congregation of the Propaganda (Rome) 1838/0726
- MLEO 4/061 Recipient : Verna (Prsdnt-Assoc'tn of Propagation of Faith-Lyon) 1838/0726
- MLEO 4/062 Author : Sacred Congregation of the Propaganda (Rome) 1838/0726
- MLEO 4/062 Recipient : Santarelli, Luigi (Charge de Affairs-Holy See-Munich) 1838/0726
- MLEO 4/063 Author : Sacred Congregation of the Propaganda (Rome) 1838/0904
- MLEO 4/063 Recipient : Viale, Michele (Apostolic Nuntio-Munich) 1838/0904
- MLEO 4/064 Author : Sacred Congregation of the Propaganda (Rome) 1838/1213
- MLEO 4/064 Recipient : Verna (Prsdnt-Assoc'tn of Propagation of Faith-Lyon) 1838/1213
- MLEO 4/065 Document : Decree of the Sacred Congregation of the Propaganda 1841/0713
- MLEO 4/065 Author : Sacred Congregation of the Propaganda (Rome) 1841/0713
- MLEO 4/065 Subject : Candolinio, Ignatio (Archbishop of Edessen) 1841/0713
- MLEO 4/065 Subject : Gregor XVI (Pope) 1841/0713
- MLEO 4/065 Subject : Lefevere, Peter Paul (Father) 1841/0713
- MLEO 4/065 Subject : Rese, Frederick (Bishop of Detroit) 1841/0713
- MLEO 4/066 Document : Notes on Decree by Sacred Congrgtn of the Propaganda 1841/0728
- MLEO 4/066 Author : Sacred Congregation of the Propaganda (Rome) 1841/0728
- MLEO 4/066 Recipient : Lefevere, Peter Paul (Elected Bp-Coadjutor of Detroit) 1841/0728
- MLEO 4/066 Subject : Gregor XVI (Pope) 1841/0728
- MLEO 4/066 Subject : Rese, Frederick (Bishop of Detroit) 1841/0728
- MLEO 4/067 Author : Petit, Didier (Father-Scrtry-Assoc. of Prop. of Faith) 1838/0811
- MLEO 4/067 Recipient : Asquini (Msgr-Abp of Jaso-Apostolic Nuntio in Naples) 1838/0811
- MLEO 4/068 Author : Sacred Congregation of the Propaganda (Rome) 1838/0708
- MLEO 4/068 Recipient : Asquini (Msgr-Abp of Jaso-Apostolic Nuntio in Naples) 1838/0708
- MLEO 4/069 Author : Sacred Congregation of the Propaganda (Rome) 1828/0102
- MLEO 4/069 Recipient : Ambassador of France (Rome?) 1828/0102
- MLEO 4/070 Author : Sacred Congregation of the Propaganda (Rome) 1827/0917
- MLEO 4/070 Recipient : Capaccini, Francesco (Substitute of the Secretary) 1827/0917
- MLEO 4/071 Author : Sacred Congregation of the Propaganda (Rome) 1838/0714
- MLEO 4/071 Recipient : Rese, Frederick (Bishop of Detroit) 1838/0714
- MLEO 4/072 Author : Habtmann, G. (President-Chancery of Brixen) 1857/0907
- MLEO 4/072 Recipient : Leopoldine Society Board of Directors 1857/0907
- MLEO 4/073 Author : Candolinio, Ignatio (Archbishop of Edessen) 1843/0115
- MLEO 4/073 Recipient : Milde, Vincent Eduard (Archbishop of Vienna) 1843/0115
- MLEO 4/074 Author : Candolinio, Ignatio (Archbishop of Edessen) 1843/0103
- MLEO 4/074 Recipient : Milde, Vincent Eduard (Archbishop of Vienna) 1843/0103
- MLEO 4/075 Author : Roothaan, Johann Philipp (Father,SJ-General) 1842/0917
- MLEO 4/075 Recipient : Milde, Vincent Eduard (Archbishop of Vienna) 1842/0917
- MLEO 4/076 Author : Portier, Michael (Bishop of Mobile) 1842/0409
- MLEO 4/076 Recipient : Leopoldine Society President and Directors 1842/0409
- MLEO 4/077 Author : Arnstein and Eskeles (Bankers-Vienna) 1834/0326
- MLEO 4/077 Recipient : Leopoldine Society Board of Directors 1834/0326
- MLEO 4/078 Author : Schmidt, Joseph (Triest) 1832/1010
- MLEO 4/078 Recipient : Gressel, Joseph (Husband of Baraga's Sister-Laibach) 1832/1010
- MLEO 4/079 Author : Raffeiner, John Stephen (Father-Hall, Tyrol) 1832/0922
- MLEO 4/079 Recipient : Leopoldine Society (Lichtenberg-Vienna) 1832/0922
- MLEO 4/080 Author : Galura, Bernard (Archbishop-Chancery of Brixen) 1832/0615
- MLEO 4/080 Recipient : Leopoldine Society Board of Directors 1832/0615
- MLEO 4/081 Author : Arnstein and Eskeles (Bankers-Vienna) 1834/0627
- MLEO 4/081 Recipient : Leopoldine Society Board of Directors 1834/0627
- MLEO 4/082 Author : Arnstein and Eskeles (Bankers-Vienna) 1833/1117
- MLEO 4/082 Recipient : Leopoldine Society Board of Directors 1833/1117
- MLEO 4/083 Author : Schmid, Bonifilius (Fr-Pastor-Mary's Annunct'n-Rosau) 1832/0404
- MLEO 4/083 Recipient : Leopoldine Society 1832/0404
- MLEO 4/084 Author : Weissenbacher, Jacob (Servant-Imperial Court-Vienna) 1832
- MLEO 4/084 Recipient : Leopoldine Society 1832
- MLEO 4/085 Author : Joannes (Brother) 1832
- MLEO 4/085 Recipient : Leopoldine Society Board of Directors 1832
- MLEO 4/086 Author : Bogner, Anna (Vienna) 1832/0516
- MLEO 4/086 Recipient : Lichtenberg, Karl Anton (Father-LS Secretary) 1832/0516
- MLEO 4/087 Author : Baar, Joseph (Father-Anstetten) 1832/0116
- MLEO 4/087 Recipient : Leopoldine Society 1832/0116
- MLEO 4/088 Author : Kussmann, Frh. (Baron-Director-Chancery of Vienna) 1832/0801
- MLEO 4/088 Recipient : Leopoldine Society 1832/0801
- MLEO 4/089 Author : Kutschker, Florian (Roemerstedten) 1832/0524
- MLEO 4/089 Recipient : Leopoldine Society Board of Directors 1832/0524
- MLEO 4/090 Author : Rudolph (Prince, Cardinal Archbishop-Olmuetz) 1829
- MLEO 4/090 Recipient : Bishops and/or Priests in Austria 1829
- MLEO 4/091 Author : Leopoldine Society Board of Directors 1829
- MLEO 4/091 Recipient : Leopoldine Society Members 1829
- MLEO 4/092 Document : Estimation of Membership Dues 1829/1102