4. General Correspondence
- UPWC D/ Folder : McEvoy, J. P.
- UPWC D/ Folder : Moloney, Rev. William A.
- UPWC D/ Folder : Monaghan, James C.
- UPWC D/ Folder : Montavon, William F.
- UPWC D/ Folder : Morgenroth, Dr. F. C.
- UPWC D/ Folder : Morrissey, Rev. A.
- UPWC D/ Folder : Muldoon, Rt. Rev. P. J.
- UPWC D/ Folder : N
- UPWC D/ Folder : N
- UPWC D/ Folder : N 1916
- UPWC D/ Folder : Na - Nh
- UPWC D/ Folder : Neff, I. E.
- UPWC D/ Folder : Nelson, Colonel
- UPWC D/ Folder : Ni - Nz
- UPWC D/ Folder : O
- UPWC D/ Folder : O - Q
- UPWC D/ Folder : O'Brien, Patrick
- UPWC D/ Folder : O'Brien, Rt. Rev. Frank A
- UPWC D/ Folder : O'Connell, Rt. Rev. John T
- UPWC D/ Folder : O'Donnell, J. Hugh "Pepper"
- UPWC D/ Folder : O'Meara, P. M.
- UPWC D/ Folder : O'Neill, Rev. A. B.
- UPWC D/ Folder : O'Shaughnessy, Thomas A.
- UPWC D/ Folder : O'Sullivan, P. T.
- UPWC D/ Folder : Oa - Og
- UPWC D/ Folder : Oa - Om
- UPWC D/ Folder : Oh - Om
- UPWC D/ Folder : On - Oz
- UPWC D/ Folder : On - Oz
- UPWC D/ Folder : Onahan, William J.
- UPWC D/ Folder : P
- UPWC D/ Folder : P 1916-1917
- UPWC D/ Folder : Pa - Pg 1916-1917
- UPWC D/ Folder : Parrot, Myron
- UPWC D/ Folder : Pasquini, Benedicto
- UPWC D/ Folder : Ph - Pz
- UPWC D/ Folder : Pustet, Frederick
- UPWC D/ Folder : Q
- UPWC D/ Folder : Q
- UPWC D/ Folder : R 1916-1917
- UPWC D/ Folder : R 1917-1919
- UPWC D/ Folder : Ra - Rd
- UPWC D/ Folder : Re - Rm 1916-1917
- UPWC D/ Folder : Roa - Roz
- UPWC D/ Folder : Rp - Rz
- UPWC E/ Folder : R 1917-1919
- UPWC E/ Folder : Richardson, Marion Muir
- UPWC E/ Folder : Rockne, Knute 1915-1916
- UPWC E/ Folder : Rose, Sister M.
- UPWC E/ Folder : S
- UPWC E/ Folder : S
- UPWC E/ Folder : S
- UPWC E/ Folder : Sa - Scg
- UPWC E/ Folder : Sa - Shh
- UPWC E/ Folder : Savage, Rev. James S.
- UPWC E/ Folder : Savay, Norbert L.
- UPWC E/ Folder : Sch
- UPWC E/ Folder : Schaefer, William E.
- UPWC E/ Folder : Scheidler, Lawrence J.
- UPWC E/ Folder : Scheier, J. B.
- UPWC E/ Folder : Schlaman, Lillian
- UPWC E/ Folder : Schmid, Otto
- UPWC E/ Folder : Scholz, Emil M.
- UPWC E/ Folder : School Methods Co.
- UPWC E/ Folder : Schumacher, Matthew J.
- UPWC E/ Folder : Schwertner, A. J.
- UPWC E/ Folder : Scott, Joseph
- UPWC E/ Folder : Scott, Russell
- UPWC E/ Folder : Scribner's Magazine
- UPWC E/ Folder : Scullin, J. E.
- UPWC E/ Folder : Search, Preston W.
- UPWC E/ Folder : Seravia, Ricardo G.
- UPWC E/ Folder : Shaughnessy, Emma M.
- UPWC E/ Folder : Shi - So
- UPWC E/ Folder : Shirely, Benjamin F.
- UPWC E/ Folder : Short, A. J.
- UPWC E/ Folder : Shouvlin, D. R.
- UPWC E/ Folder : Shurin, Mary D.
- UPWC E/ Folder : Sims, William I.
- UPWC E/ Folder : Slevin, Spalding
- UPWC E/ Folder : Smith, Mary E. K.
- UPWC E/ Folder : Smith, Mrs. Joseph P.
- UPWC E/ Folder : Smith, Rev. John Talbot
- UPWC E/ Folder : Sobolewski, Rev. Wenceslaus
- UPWC E/ Folder : Solon, Rev. J. A.
- UPWC E/ Folder : Sorin, Marcelle
- UPWC E/ Folder : Sp - Std
- UPWC E/ Folder : Spearman, Thomas Clark
- UPWC E/ Folder : Spillard, Rev. Arthur D.
- UPWC E/ Folder : Steis, Henry A.
- UPWC E/ Folder : Stephenson, Burr C.
- UPWC E/ Folder : Stogsdall, Ralph R.
- UPWC E/ Folder : Stoll, Edgar A.
- UPWC E/ Folder : Story, E. J.
- UPWC E/ Folder : Str - Sz
- UPWC E/ Folder : Straus, Mrs. Harry
- UPWC E/ Folder : Studebaker, J. M. & G. M.
- UPWC E/ Folder : Swan, L. L.
- UPWC E/ Folder : T
- UPWC E/ Folder : T