- Chatelain, Henri Abraham. Atlas historique2
- Chicago and North Western Railway Company2
- Chicago, Burlington & Quincy Railroad Company2
- Chicago, Milwaukee, and St. Paul Railway Company2
- Chishitsu Chōsajo2
- Congress2
- Connecticut. State Highway Department2
- Cook, R.2
- Cooke, Chas. E.2
- Copp Clark Company2
- Coquart, A.2
- Cosa, Juan de la, -15102
- Courtenay, F. letterer2
- Cowen, Clinton2
- Cox, E. T. (Edward Travers), 1821-19072
- Cox, William T. (William Thomas), 1878-19612
- Croisey, Jean-Baptiste2
- Cóvens et Mortier.2
- Dagelet, Joseph Lepante2
- Davies, J. H. (J. Hudson)2