Gustave Grupe to Marie Grupe, December 20, 1909

Gustave Grupe to Marie Grupe, January 2, 1909

Gustave Grupe to Marie Grupe, July 7, 1908

Gustave Grupe to Marie Grupe, December 15, 1907

Gustave Grupe to Marie Grupe, May 12, 1907

Letter from Gustave Grupe to his aunt, Marie Grupe, May 12, 1907.

Gustave Grupe to Marie Grupe, July 8, 1906

Letter from Gustave Grupe to his aunt, Marie Grupe, July 8, 1906.

Gustave Grupe to Marie Grupe, November 16, 1904

Gustave Grupe to Marie Grupe, December 18, 1901

Maria Baur Eichner [?] to Friedricka Baur Eichner, October 28, 1909

Maria Baur Eichner [?] to Friedricka Baur Eichner, October 28, 1909.

Franziska Mansolf to Dora Ziegenhagen, December, 1901

Letter from Franziska Mansolf to her stepmother, Dora Ziegenhagen, December, 1901.

Franziska Mansolf to Dora Ziegenhagen, December 27, 1909

Letter from Franziska Mansolf to her stepmother, Dora Ziegenhagen, December 27, 1909.

Lenchen Berdel to Eugen Klee, February 29, 1904

Letter from Magdalena (“Lenchen”) Berdel to Eugen Klee, February 29, 1904. “Lenchen” Berdel was a daughter of Eugen Klee's first cousin Magdalena “Lenchen” Cherdron.

Lenchen Cherdron to Eugen Klee, February 25, 1904

Letter from Magdalena (“Lenchen”) Cherdron to Eugen Klee, February 25, 1904. “Lenchen” Cherdron was the first cousin of Eugen Klee.

Heinrich Haas to Eugen Klee, January 10, 1904

Letter from Heinrich Haas to Eugen Klee, January 10, 1904. Heinrich Haas was the widower of Eugen Klee's sister Amalia.

Heinrich Haas to Eugen Klee, October 4, 1901

Letter from Heinrich Haas to Eugen Klee, October 4, 1901. Heinrich Haas was the widower of Eugen Klee's sister Amalia.

Heinrich Haas and Eugen Haas to Eugen Klee, July 30, 1901

Letter from Heinrich Haas and Eugen Haas to Eugen Klee, July 30, 1901.

Heinrich Haas to Eugen Klee, July 30, 1901

Letter from Heinrich Haas to Eugen Klee, July 30, 1901. Heinrich Haas was the widower of Eugen Klee's sister Amalia.

Klee family letter, July 6, 1901

Klee family letter, July 6, 1901.

Heinrich Haas to Eugen Klee, May 8, 1901

Letter from Heinrich Haas to Eugen Klee, May 8, 1901. Heinrich Haas was the widower of Eugen Klee's sister Amalia.

Emil Luckez to Eugen Klee, May 6, 1901

Letter from Emil Luckez to Eugen Klee, May 6, 1901.