Letter Books - Indexed Series - #1-1449
- CHUR #1005 Correspondent : Hotel Aurora- Clinton B. Marshall 2p (31)
- CHUR #1006 Correspondent : Marshall, George S. 4p (31)
- CHUR #1007 Correspondent : Marshall, S.J. 3p (31)
- CHUR #1008 Correspondent : Marshall, W.H. 2p (31)
- CHUR #1009 Correspondent : A.E. Staley Manufacturing Company- Earl W. Martin 6p (31)
- CHUR #1010 Correspondent : Martin, F.K. 5p (31)
- CHUR 3/06 Folder : Letter Book 32 - Letters #1011-1050
- CHUR #1011 Correspondent : Martin, H.C. 3p (32)
- CHUR #1012 Correspondent : Detroit Edison Company - M.L. Martin 2p (32)
- CHUR #1013 Correspondent : Martin, T.W., Jr. 33p (32)
- CHUR #1014 Correspondent : Martin and Martin 3p (32)
- CHUR #1015 Correspondent : Mason-Harlan Coal and Land Corporation- R.C. Mason 2p (32)
- CHUR #1016 Correspondent : Mathias and Sullivan 2p (32)
- CHUR #1017 Correspondent : Mayer, Levy 2p (32)
- CHUR #1018 Correspondent : Mayer, Mark A. 3p (32)
- CHUR #1019 Correspondent : Jacobi Brothers and Mack- Julian Mack 4p (32)
- CHUR #1020 Correspondent : Buffalo Times- Norman E. Mack 10p (32)
- CHUR #1021 Correspondent : MacMillan Company- H.S. Lathan 4p (32)
- CHUR #1022 Correspondent : Mullaney, Bernard J. 5p (32)
- CHUR #1023 Correspondent : Maley, William H. 22p (32)
- CHUR #1024 Correspondent : Mundelein, George W., Archbishop of Chicago 3p (32)
- CHUR #1025 Correspondent : Delaware and Hudson Company- J.H. Manning 7p (32)
- CHUR #1026 Correspondent : Manufacturers Record- Richard H. Edmonds 13p (32)
- CHUR #1027 Correspondent : Michaelson, Charles, and Michaelson, B.C. 23p (32)
- CHUR #1028 Correspondent : Marcosson, Isaac F. 3p (32)
- CHUR #1029 Correspondent : Marinan, Jack 3p (32)
- CHUR #1030 Correspondent : Shur-loc Company of Illinois- E.L. Markey 12p (32)
- CHUR #1031 Correspondent : Marsh, Wilbur W. 3p (32)
- CHUR #1032 Correspondent : McGuinley, J.R. 14p (32)
- CHUR #1033 Correspondent : Matschke, Carl H. 2p (32)
- CHUR #1034 Correspondent : Matter, Newton E. 12p (32)
- CHUR #1035 Correspondent : Matthews, M.A. 6p (32)
- CHUR #1036 Correspondent : Matthiessen, C.H. 19p (32)
- CHUR #1037 Correspondent : London Times- Cuthbert Maugham, Arthur Willert 20p (32)
- CHUR #1038 Correspondent : McAdoo, Malcolm R. 4p (32)
- CHUR #1039 Correspondent : McAleenan, W.J. 3p (32)
- CHUR #1040 Correspondent : McAndrews, James 2p (32)
- CHUR #1041 Correspondent : Philadelphia Electric Company- John McCall 3p (32)
- CHUR #1042 Correspondent : Newark City Board of Trade- Uzal H. McCarter 3p (32)
- CHUR #1043 Correspondent : American Iron and Steel Institute- James T. McCleary 2p (32)
- CHUR #1044 Correspondent : Harrisburg Chamber of Commerce- Edward L. McColgin 4p (32)
- CHUR #1045 Correspondent : McCombs, William F. 2p (32)
- CHUR #1046 Correspondent : McCove, Peter F. 3p (32)
- CHUR #1047 Correspondent : Packard Company- Alvin McCoy 5p (32)
- CHUR #1048 Correspondent : McDonald, R.V. 3p (32)
- CHUR #1049 Correspondent : McEnery, Mary A. 3p (32)
- CHUR #1050 Correspondent : McGillen, John 6p (32)
- CHUR 3/07 Folder : Letter Book 33 - Letters #1051-1090
- CHUR #1051 Correspondent : McGregor, John A. 3p (33)
- CHUR #1052 Correspondent : National Tent and Awning Manufacturers Association- (33) James E. McGregor 2p (33)
- CHUR #1053 Correspondent : McIntosh, H. Milne 9p (33)
- CHUR #1054 Correspondent : McIntyre, George 5p (33)
- CHUR #1055 Correspondent : McCarthy, M.H. 5p (33)
- CHUR #1056 Correspondent : McCarthy, C.H. 4p (33)
- CHUR #1057 Correspondent : West Side Catholic Club- George A. Priest 11p (33)
- CHUR #1058 Correspondent : McCarthy, George 11p (33)
- CHUR #1059 Correspondent : Chicago-Cleveland Car Roofing Company- J.J. McCarthy 7p (33)
- CHUR #1060 Correspondent : McCormick, Cyrus H. 2p (33)
- CHUR #1061 Correspondent : Moore and McCormack Company- E.J. McCormack 9p (33)
- CHUR #1062 Correspondent : J.J. Ryan and Company- James A. McCormick 5p (33)
- CHUR #1063 Correspondent : McCormick, Medill 18p (33)
- CHUR #1064 Correspondent : Chicago Tribune- Robert R. McCormick, J.M. Patterson 13p (33)
- CHUR #1065 Correspondent : Evans, Frank S. 2p (33)
- CHUR #1066 Correspondent : McDonald, James B. 9p (33)
- CHUR #1067 Correspondent : McGowan, Rear Admiral 2p (33)
- CHUR #1068 Correspondent : McGrath, Courtney 4p (33)
- CHUR #1069 Correspondent : McGuinn, James J. 12p (33)
- CHUR #1070 Correspondent : McGuire, William F. 18p (33)
- CHUR #1071 Correspondent : McInerney, Michael 7p (33)
- CHUR #1072 Correspondent : McLoughlin Brothers 5p (33)
- CHUR #1073 Correspondent : Steamoter Truck Company- F.B. McMullen 2p (33)
- CHUR #1074 Correspondent : Norfolk Chamber of Commerce- F.W. McKinney 4p (33)
- CHUR #1075 Correspondent : McManus, Mr. 2p (33)
- CHUR #1076 Correspondent : McMullen-Powell Lumber Company- F.B. McMullen 2p (33)
- CHUR #1077 Correspondent : McMynn, Robert M. 3p (33)
- CHUR #1078 Correspondent : McNulty, F.J. 2p (33)
- CHUR #1079 Correspondent : McLean, Edward Beale 2p (33)
- CHUR #1080 Correspondent : McLean, Walter Scott 7p (33)
- CHUR #1081 Correspondent : War Finance Corporation- A.W. McLean 4p (33)
- CHUR #1082 Correspondent : McLean, Charles F. 3p (33)
- CHUR #1083 Correspondent : Macon News- R.L. McKenney 6p (33)
- CHUR #1084 Correspondent : Great Western Sand and Gravel Company- John J. McLaughlin 4p (33)
- CHUR #1085 Correspondent : McMynn, John C. 14p (33)
- CHUR #1086 Correspondent : McNab, Gavin 9p (33)
- CHUR #1087 Correspondent : Mellon, W.P. 2p (33)
- CHUR #1088 Correspondent : Mitchell, Mendenhall and Company- J. Mendenhall 4p (33)
- CHUR #1089 Correspondent : First National Corporation- D.A. Menocal 2p (33)
- CHUR #1090 Correspondent : Menos, Solon 2p (33)
- CHUR 3/08 Folder : Letter Book 34 - Letters #1091-1115
- CHUR #1091 Correspondent : C.H. Sprague and Son- Eugene E. O'Donnell 3p (34)
- CHUR #1092 Correspondent : Meredith, Edwin 6p (34)
- CHUR #1093 Correspondent : Merrill, Lynch and Company 3p (34)
- CHUR #1094 Correspondent : Mertsheimer, Fred 3p (34)
- CHUR #1095 Correspondent : Messenger, H.B. 7p (34)
- CHUR #1096 Correspondent : Metropolis Company- W.R. Carter 7p (34)
- CHUR #1097 Correspondent : Metzel, Alexander L. 3p (34)
- CHUR #1098 Correspondent : Metzger, Charles A. 3p (34)
- CHUR #1099 Correspondent : Mid-Day Club 3p (34)
- CHUR #1100 Correspondent : Third Federal Reserve District,- M.F. Middleton 3p (34)
- CHUR #1101 Correspondent : Hurley, E.N.- confidential 35p (34)