“ Finding the climate of his native country injurious to his health, he went to Algiers and Tunis, and took part, as a surgeon, in several expeditions into the interior. Commissioned by the king of Prussia to carry gifts to the sultan of Bornu in acknowledgment of kindness shown to German travellers, he set out in 1869 from Tripoli, and succeeded after two years' journeying in accomplishing his mission. ”