BRIEF [O.A.] Doerflinger, Carl Author: Doerflinger, Carl Recipient: Haeckel, Ernst Dating: 15.03.1877
BRIEF OHNE UMSCHLAG Wolff, Frank J. Author: Wolff, Frank J. Recipient: Haeckel, Ernst Corporation: Insurance, Real Estate and Loans Dating: 28.06.1909
BRIEF OHNE UMSCHLAG Wolff, Frank J. Author: Wolff, Frank J. Recipient: Haeckel, Ernst Corporation: Insurance, Real Estate and Loans Dating: 23.06.1910
BRIEF OHNE UMSCHLAG Wolff, Frank J. Author: Wolff, Frank J. Recipient: Haeckel, Ernst Corporation: Insurance, Real Estate and Loans Dating: 14.09.1909
BRIEF OHNE UMSCHLAG Becker, Wilhelm Carl Author: Becker, Wilhelm Carl Recipient: Haeckel, Ernst Dating: 10.02.1909