Autograph letter signed; "Ernst Haeckel," to "Lieber Herr Doktor," April 17, 1893
Jena. -. One page on a single leaf, seemingly torn from a bifolium, approx. 5-1/2 X 8-1/2 in. Haeckel writes an unnamed colleague having just returned from two months in Sicily to acknowledge a letter he found waiting. Ernst Haeckel (1834-1919) was a renowned naturalist and professor of comparative anatomy..... More