- UPEL 55/13 Letter : T.W. O'Mara to AM 1896/0917
- UPEL 55/13 Letter : Samuel M. Ordetx to AM 1896/0917
- UPEL 55/13 Letter : J. O'Connor to AM 1896/0920
- UPEL 55/13 Letter : Federico Ordetx to AM 1896/0922
- UPEL 55/13 Letter : James J. Haughton to Dear Sir 1896/0923
- UPEL 55/13 Letter : Samuel M. Ordetx to AM 1896/0924
- UPEL 55/13 Letter : J. O'Connor to AM 1896/0924
- UPEL 55/13 Letter : Hugh O'Neill to AM 1896/0929
- UPEL 55/14 Letter : L.W. Nevius to AM 1896/1006
- UPEL 55/14 Letter : Samuel M. Ordetx to AM 1896/1008
- UPEL 55/14 Letter : J.B. O'Malley to AM 1896/1010
- UPEL 55/14 Letter : J.P. O'Neil to AM 1896/1011
- UPEL 55/14 Letter : Frank A. O'Brien to AM 1896/1013
- UPEL 55/15 Letter : F.Z. Rooker to AM 1896/1115
- UPEL 55/15 Letter : Federico Ordetx to AM 1896/1117
- UPEL 55/15 Letter : The Catholic Press Company / New World to AM; clipping attached 1896/1130
- UPEL 55/15 Letter : Hugh O'Neill to Brother Paul Hermit 1896/1130
- UPEL 55/16 Letter : T.F. Kennedy / The George P. Rowell Advertising Company to Notre Dame University 1896/1204
- UPEL 55/16 Letter : James Naughton to AM 1896/1205
- UPEL 55/16 Letter : Kate R. O'Hara to AM 1896/1209
- UPEL 55/16 Letter : Charles Nast to AM 1896/1210
- UPEL 55/16 Letter : A.E. Otis to AM 1896/1215
- UPEL 55/16 Letter : John Newell to AM 1896/1218
- UPEL 55/16 Letter : Kate R. O'Hara to AM 1896/1218
- UPEL 55/16 Letter : Hugh O'Neill to AM 1896/1219
- UPEL 55/16 Letter : Mollie O'Brien to President Notre Dame College 1896/1223
- UPEL 55/16 Letter : Peter J. O'Callaghan to AM 1896/1224
- UPEL 55/16 Letter : Charles Nast to AM 1896/1229
- UPEL 55/16 Letter : Peter J. O'Callaghan to AM 1896/1230
- UPEL 55/17 Letter : Martha O'Hara to AM 1897/0102
- UPEL 55/17 Letter : J. O'Connor to AM 1897/0107
- UPEL 55/17 Letter : M. O'Sullivan to AM 1897/0109
- UPEL 55/17 Letter : George W. Nevius to Dear Father 1897/0110
- UPEL 55/17 Letter : Ed. O'Malley to AM 1897/0112
- UPEL 55/17 Letter : Ed. O'Malley to Son Eddie 1897/0112
- UPEL 55/17 Letter : James O'Shaughnessy to AM 1897/0114
- UPEL 55/17 Letter : L.W. Nevius to AM 1897/0114
- UPEL 55/17 Letter : T. O'Sullivan to AM 1897/0115
- UPEL 55/17 Letter : George R. Riley to AM 1897/0116
- UPEL 55/17 Letter : Thomas O'Gorman to AM 1897/0116
- UPEL 55/17 Letter : John Redpath to AM 1897/0119
- UPEL 55/17 Letter : Samuel M. Ordetx to AM; note attached 1897/0120
- UPEL 55/17 Letter : William S. O'Meara to Very Rev. Dear Sir 1897/0121
- UPEL 55/17 Letter : James P. O'Brien to AM 1897/0123
- UPEL 55/17 Letter : Federico Ordetx to AM 1897/0126
- UPEL 55/17 Letter : Samuel Ordetx to AM 1897/0127
- UPEL 55/17 Letter : Hugh O'Neill to AM 1897/0128
- UPEL 55/17 Letter : Joseph J. Rowan to AM 1897/0129
- UPEL 55/17 Letter : Charles Haussner to AM; regarding Alfred Richon 1897/0130
- UPEL 55/18 Letter : J. Rudnicki to AM 1897/0201
- UPEL 55/18 Letter : Mrs. J.H. Robbins to AM 1897/0204
- UPEL 55/18 Letter : Mrs. E.T. Rees to AM 1897/0204
- UPEL 55/18 Letter : William S. O'Meara to AM 1897/0205
- UPEL 55/18 Letter : William O. Rogers to Dear Sir 1897/0205
- UPEL 55/18 Letter : Anne Ryan to AM 1897/0210
- UPEL 55/18 Letter : J. Havens Richards to AM 1897/0211
- UPEL 55/18 Letter : Eugene J. O'Rourke to AM 1897/0212
- UPEL 55/18 Letter : T.W. O'Mara to AM 1897/0215
- UPEL 55/18 Letter : Hugh O'Neill to AM 1897/0218
- UPEL 55/18 Letter : Charles Haussner to AM; regarding Alfred Richon 1897/0219
- UPEL 55/18 Letter : Emil Neef to AM 1897/0222
- UPEL 55/18 Letter : Eugene J. O'Rourke to AM 1897/0222
- UPEL 55/18 Letter : Charles O'Reilly to Brother Otto 1897/0223
- UPEL 55/18 Letter : The George P. Rowell Advertising Company to Notre Dame University 1897/0227
- UPEL 55/19 Letter : Charles O'Reilly to AM 1897/0301
- UPEL 55/19 Letter : Mrs. Bertie A. Ray to AM, another letter from Ray to AM attached 1897/0301
- UPEL 55/19 Letter : Mrs. J.H. Robbins to AM 1897/0302
- UPEL 55/19 Letter : Timothy Nester to AM 1897/0303
- UPEL 55/19 Letter : Hattie A. Hobert to University of Notre Dame 1897/0305
- UPEL 55/19 Letter : J. Redpath to AM 1897/0308
- UPEL 55/19 Letter : Alice Reddy to AM 1897/0309
- UPEL 55/19 Letter : Kate R. O'Hara to AM 1897/0309
- UPEL 55/19 Letter : Martha O'Hara to AM 1897/0312
- UPEL 55/19 Letter : Lewis Rhoton to Father Superior Notre Dame College 1897/0312
- UPEL 55/19 Letter : Kittie O'Brien to My Dear Father 1897/0314
- UPEL 55/20 Letter : Maud Rennolds to AM 1897/0315
- UPEL 55/20 Letter : John Redpath to AM 1897/0316
- UPEL 55/20 Letter : Alice M. Reddy to University of Notre Dame [Registry Return Receipt] 1897/0317
- UPEL 55/20 Letter : Alice M. Reddy to AM 1897/0320
- UPEL 55/20 Letter : J.D. Oliver / Oliver Chilled Plows to L.W. Royse; letter of recommendation for Notre Dame and AM 1897/0322
- UPEL 55/20 Letter : J.C. Gillan to AM; regarding O'Brien 1897/0322
- UPEL 55/20 Letter : T. O'Sullivan to AM 1897/0324
- UPEL 55/20 Letter : Charles Haussner to To whom it may concern; regarding Alfred Richon 1897/0330
- UPEL 55/20 Letter : The Catholic Press Company / New World to AM 1897/0330
- UPEL 55/20 Letter : Sarah O'Brien to AM 1897/0330
- UPEL 55/20 Letter : Joseph P. Rademacher (Bischop of Fort Wayne) to Rev. Dear Father 1897/0331
- UPEL 55/21 Letter : John Redpath to AM 1897/0402
- UPEL 55/21 Letter : Mrs. James O'Brien to AM 1897/0403
- UPEL 55/21 Letter : J. O'Connor to AM 1897/0404
- UPEL 55/21 Letter : P.J. O'Keeffe to AM 1897/0405
- UPEL 55/21 Letter : Hugh D. Rodman to Rev. President of Notre Dame University 1897/0406
- UPEL 55/21 Letter : Kate R. O'Hara to AM 1897/0406
- UPEL 55/21 Letter : P.J. O'Neil to AM 1897/0407
- UPEL 55/21 Letter : Joseph J. Rowan to AM 1897/0412
- UPEL 55/21 Letter : W.H. Kinnier to Joseph J. Rowan 1897/0413
- UPEL 55/21 Letter : Rhoda A. Smith to My Dear Son Alfred Richon 1897/0413
- UPEL 55/21 Letter : P.J. O'Keeffe to AM 1897/0417
- UPEL 55/21 Letter : Mrs. M.A. Rennolds to AM 1897/0426
- UPEL 55/21 Letter : P.J. O'Keeffe to AM 1897/0429
- UPEL 55/22 Letter : John Redpath to AM 1897/0501