Letter Books - Indexed Series - #1-1449
- CHUR #234 Correspondent : Colville, Edith 7p (8)
- CHUR #235 Correspondent : Commercial National Bank- John Randolph Bolling 2p (8)
- CHUR #236 Correspondent : Conrad, Mildred C. 3p (8)
- CHUR #237 Correspondent : New York City Police Department- Daniel E. Costigan 3p (8)
- CHUR #238 Correspondent : Cook, Charles B. 2p (8)
- CHUR #239 Correspondent : Bolling, Richard W. 3p (8)
- CHUR #240 Correspondent : Cooke, Morris L. 3p (8)
- CHUR #241 Correspondent : Cooper, D.Y. 2p (8)
- CHUR #242 Correspondent : New York World- F.E. Cooper and Herbert B. Swope 10p (8)
- CHUR #243 Correspondent : Cooper, George 3p (8)
- CHUR #244 Correspondent : Lincoln Highway- J.W. Corkings, Robert R. McCormick, (8) S.E. Bradt, Charles W. Hadley, James T. Voshell, (8) E.L. Gates,Newton E. Matter. 39p (8)
- CHUR #245 Correspondent : Settle Chamber of Commerce- Gordon C. Corbaley 3p (8)
- CHUR #246 Correspondent : Shouvlin, John O. 3p (8)
- CHUR #247 Correspondent : Cremin, Joseph W. 5p (8)
- CHUR #248 Correspondent : Crews, Ralph 22p (8)
- CHUR #249 Correspondent : Critchfield and Company- E.E. Critchfield 7p (8)
- CHUR #250 Correspondent : Saint Teresa's Church 3p (8)
- CHUR 1/09 Folder : Letter Book 9 - Letters #251-285
- CHUR #251 Correspondent : New Republic- Herbert Croly 4p (9)
- CHUR #252 Correspondent : Cromwell, Seymour M. 3p (9)
- CHUR #253 Correspondent : Crowley, R.C. 2p (9)
- CHUR #254 Correspondent : Corboy, Louis W. 12p (9)
- CHUR #255 Correspondent : Old Colony Club 15p (9)
- CHUR #256 Correspondent : Doherty, Henry L. 9p (9)
- CHUR #257 Correspondent : Curran, Thomas F.V. 2p (9)
- CHUR #258 Correspondent : Cohan, George M. 14p (9)
- CHUR #259 Correspondent : Collins, James H. 11p (9)
- CHUR #260 Correspondent : Crowell, Julia C. 2p (9)
- CHUR #261 Correspondent : John W. Ferguson Company- James W. Cooke 4p (9)
- CHUR #262 Correspondent : Crowther, Samuel 9p (9)
- CHUR #263 Correspondent : Conley, J.J. 9p (9)
- CHUR #264 Correspondent : Ryan, Condon and Livingston- James G. Condon 9p (9)
- CHUR #265 Correspondent : W.W. Kimball Company- E.S. Conway 3p (9)
- CHUR #266 Correspondent : Copley, Ira C. 6p (9)
- CHUR #267 Correspondent : Cosgrove, John C. 9p (9)
- CHUR #268 Correspondent : Cosmos Club- Layman J. Briggs 8p (9)
- CHUR #269 Correspondent : Committee on Public Information- George Creel 8p (9)
- CHUR #270 Correspondent : Kennedy, Philip B. 3p (9)
- CHUR #271 Correspondent : Cunningham, Thomas P. 3p (9)
- CHUR #272 Correspondent : Literary Digest, Funk and Wagnalls Company- Cuddihy, R.J. 6p (9)
- CHUR #273 Correspondent : Cullinan, William 3p (9)
- CHUR #274 Correspondent : Donnelly, Richard S. 16p (9)
- CHUR #275 Correspondent : Cullen, George 4p (9)
- CHUR #276 Correspondent : Cullen, Frank R. 28p (9)
- CHUR #277 Correspondent : Cummings, Homer S. 19p (9)
- CHUR #278 Correspondent : United States Tariff Commission- William S. Culbertson 5p (9)
- CHUR #279 Correspondent : Dawes, Charles G. 5p (9)
- CHUR #280 Correspondent : Daley, Herman P. 3p (9)
- CHUR #281 Correspondent : Touring Club of America, Central Trust Company of Illinois, (9)
- CHUR #281 Correspondent : Illinois Highway Improvement Association- William G. Edens,
- CHUR #281 Correspondent : J.E. Otis, and Albert C. Mang 28p (9)
- CHUR #282 Correspondent : Chase National Bank- Gerhard M. Dahl 2p (9)
- CHUR #283 Correspondent : Dalton, Frank R. 2p (9)
- CHUR #284 Correspondent : Newark Free Public Library- John Cotton Dana 4p (9)
- CHUR #285 Correspondent : International Committee of Young Men's Christian Association-
- CHUR #285 Correspondent : Nathaniel P. David and A.C. Harte 4p (9)
- CHUR 1/10 Folder : Letter Book 10 - Letters #286-320
- CHUR #286 Correspondent : Shaffer, John C. 4p (10)
- CHUR #287 Correspondent : Illinois Theatre- Will J. David 4p (10)
- CHUR #288 Correspondent : Edgar, H.T. 3p (10)
- CHUR #289 Correspondent : Day and Zimmerman- Charles Day 38p (10)
- CHUR #290 Correspondent : Daugherty, Edwin Matthew 10p (10)
- CHUR #291 Correspondent : Day, Stephen A. 5p (10)
- CHUR #292 Correspondent : Hardware Age- E.H. Darville and Roy F. Soutle 63p (10)
- CHUR #293 Correspondent : DeLong, W.D. 3p (10)
- CHUR #294 Correspondent : Democracy Photography Company- Lee Francis Lybarger 2p (10)
- CHUR #295 Correspondent : Saint Mary's House- A. Debiel 8p (10)
- CHUR #296 Correspondent : Diffenbaugh Coal and Ice Company- J.D. Diffenbaugh 2p (10)
- CHUR #297 Correspondent : Deeds, Edward A. 5p (10)
- CHUR #298 Correspondent : Deegan, James 5p (10)
- CHUR #299 Correspondent : Dilnot, Frank 5p (10)
- CHUR #300 Correspondent : Western Union Telegraph Company 2p (10)
- CHUR #301 Correspondent : Debes, Georgette 9p (10)
- CHUR #302 Correspondent : Defrees, Buckingham and Eaton- Joseph H. Defrees 2p (10)
- CHUR #303 Correspondent : Delano, Jane B. 2p (10)
- CHUR #304 Correspondent : War Recreation Board of Illinois 2p (10)
- CHUR #305 Correspondent : U.S. Naval Training Station- A.R. Dickson 4p (10)
- CHUR #306 Correspondent : Goes, Arthur 3p (10)
- CHUR #307 Correspondent : Cost EngineerPublishing Company- Robert S. Denham 5p (10)
- CHUR #308 Correspondent : Delaware River Shipbuilding Council- Michael Francis Doyle 3p
- CHUR #309 Correspondent : Doody, William J. 3p (10)
- CHUR #310 Correspondent : Dooley, Barry J. 6p (10)
- CHUR #311 Correspondent : P.W. Burnham and Company- Ralph Douglass 5p (10)
- CHUR #312 Correspondent : Drake, Fred S. 3p (10)
- CHUR #313 Correspondent : Dougherty, Hugh F. 4p (10)
- CHUR #314 Correspondent : Chicago Liberty Loan Committee- W.H. Dolan 5p (10)
- CHUR #315 Correspondent : Donnelly, Ben 2p (10)
- CHUR #316 Correspondent : Associated Advertising Cubs of the World, (10) World's Work, and Doubleday Page and Company- (10) Herbert S. Houston, J.S. Nichols, (10) Burton J. Hendrick, and E.F. Strother 80p (10)
- CHUR #317 Correspondent : Fergus, Robert C. 3p (10)
- CHUR #318 Correspondent : Dollar, Robert 2p (10)
- CHUR #319 Correspondent : Georgetown University- A.J. Donlin 2p (10)
- CHUR #320 Correspondent : Donnelly, D.B. 2p (10)
- CHUR 1/11 Folder : Letter Book 11 - Letters #321-335
- CHUR #321 Correspondent : Donahoe, Daniel 3p (11)
- CHUR #322 Correspondent : Donahoe, Harry 2p (11)
- CHUR #323 Correspondent : Briggs, Walter O. 4p (11)
- CHUR #324 Correspondent : C. Doering and Son- C. Doering 2p (11)
- CHUR #325 Correspondent : Pullman Company- M.J. Dolan, Clyde Runnells, C.O. Cox 21p (11)
- CHUR #326 Correspondent : Iowa Railway and Light Company- William G. Davis 2p (11)
- CHUR #327 Correspondent : Drury, M.J. 2p (11)