From the collections it seems that Boos and Scholl, or Scholl alone, collected as far north as Namaqualand and east to Kaffraria.
After first visiting Franschhoek, Döhne left for Kaffraria in response to a request from fellow missionary Kayser.
Their territory was annexed peacefully to the Cape Colony in 1884: missionary work had already begun in 1873 on the initiative of Henry Callaway, Bishop of St John's Kaffraria.
Kaffraria was the descriptive name given to the southeast part of what is today the Eastern Cape of South Africa.
Whilst under the command of Captain W. Barron, the SS Kaffraria ran aground in the river Elbe at Otterndorf, Germany on 7 January 1891.