“ His father was a Protestant pastor, and he was trained to be a mining engineer. He was ambitious, however, to become a scientific investigator of unknown regions, and with that object studied the natural sciences, especially zoology. In 1850 he went to Egypt where he learnt Arabic, afterwards visiting Arabia Petraea. In 1852 he accompanied Dr Reitz, Austrian consul at Khartum, on a journey to Abyssinia, and in the next year was appointed Dr Reitz’s successor in the consulate. ”

“ Ornithologie von Nordost-Afrika (Cassel, 1869–1875) ; Reise in Nordost-Afrika (Brunswick, 1877, 2 vols.) A list of the more important of his numerous contributions to Petermann’s Mitteilungen will be found in that serial for 1877 at the close of the necrological notice. ”