BRIEF OHNE UMSCHLAG Scheffauer, Herman Author: Scheffauer, Herman Recipient: Haeckel, Ernst Dating: 13.01.1909
BRIEF OHNE UMSCHLAG Scheffauer, Herman Author: Scheffauer, Herman Recipient: Haeckel, Ernst Dating: 13.04.1909
BRIEF OHNE UMSCHLAG Scheffauer, Herman Author: Scheffauer, Herman Recipient: Haeckel, Ernst Dating: 31.05.1909
BRIEF [O.A.] Sevey, Ellen J... Author: Sevey, Ellen J... Recipient: Haeckel, Ernst Dating: 06.06.1909
BRIEF OHNE UMSCHLAG WPT Author: WPT Recipient: Haeckel, Ernst Corporation: The Edison Electric Company Los Angeles, California - Southern California Edison Company Dating: 09.10.1909