Charles E. Hooper (The Rationalist Press Association) an Ernst Haeckel, London, 11. April 1900
The Rationalist Presss Association,
Registered Office –
17, Johnson’s Court, Fleet St., London, E. C.
11 April 1900.
In order to fully protect our rights in „Die Welträthsel” in this country, our solicitor advises that we should have a formal concession from you. I will therefore thank you to sign the enclosed sheet, inserting date, and having it witnessed, and to return it to me at your earliest convenience.
With compliments., believe me to remain
Charles E. Hooper,
Prof. Ernst Haeckel.