 This enabled him to return to Germany in 1925.He made two further visits to South West Africa, from 1928 to 1929 when he collected in the coastal desert area, and again from 1933 to 1935 when he travelled north from Grootfontein to the Okavango River and in the South from Aus to Sendelingsdrift on the Orange River.He died in Neukirch/Lausitz, aged 77.