In 1810 he published "Reisen im südlichen Afrika"; as a result, he was appointed professor of zoology at the University of Berlin in 1811, and appointed director of the Berlin Zoological Museum in 1813.
In 1810 he published "Reisen im südlichen Afrika". He was awarded the Chair of Zoology at the University of Berlin in 1811, and appointed Director of the Berlin Zoological Museum in 1813.