The explorer Nachtigal with Sheik Omar of Bornu, 5 June 1870, (1936). 'Der Forscher Nachtigal Bei Scheich Omar Von Bornu, 5 Juni 1870'. Gustav Nachtigal giving presents from German emperor Wilhelm I (including a portrait of Wilhelm) to Umar of Borno in acknowledgment of kindness shown to German travellers. German explorer Gustav Nachtigal (1834-1885) visited Sheik Umar of Borno (died 1881), ruler of the Kanem-Bornu Empire (which formerly existed in areas what are now Chad and Nigeria). Nachtigal served as the German Empire's consul-general for Tunisia and Commissioner for West Africa. From "Bilder Deutscher Geschichte", (Pictures of German History), No.12, cigarette card album. [Cigaretten-Bilderdienst, Altona-Bahrenfeld, Hamburg, Germany, 1936]