Letters and travel reports by Johannes Wilhelm Karl Spiecker to Deputation and P. Gottlob Haussleiter, 1905-1906; travel plan, pag. 209, 1906

1891-1899 in Ondjiva, 1899-1932 Steinkopf and De Doorns, 1899-1902 home service; letters and work report; private letters to Inspector Schreiber; correspondence in property matters;