1895-1900 in Rietfontein, Warmbad, Pfarramt USA et al. in St. John's Luth Church, Campbell Hill, Ill.; letters and reports, 1895-1900; curriculum vitae, ca. 1890; private letters to inspectors of the RMG, 1895-1900; What can we learn from the Good Samaritan for our mission, paper, 1899; letter about his departure from Mission, 1900; letters from Campbell Hill, Illinois/USA, 1921-1922;

1899-1904 in Keetmanshoop, Warmbad; correspondence and reports; curriculum vitae; letter of the eldest Witbooi in Nabis; request of the church of Warmbad for a new missionary;

1900-1936 in Walvis Bay, Steinkopf, Concordia, Lüderitzbucht, Warmbad; letters and reports, 1900-1936; cover letter, 1893; curriculum vitae of Mrs. Maria Nyhof, née Stotijn (copy), 1903; letter of Carl Ludwig Hermann Hegner to Hermann Nyhof about conditions in Warmbad, 1904; overview of d. Distribution of the Bondels on the various squares in the Warmbad district and sketch of the Bondels Reservate, 1908; Count von Hageneck, request for repair of the tower roof chair of the church in Warmbad, 1908; obituaries for Hermann Nyhof, 1936; correspondence with Maria Nyhof, née Stotijn, 1937-1962;