Correspondence of Rorarius, Accounts, etc., 1937-1938; A Few Pen-pictures from the Work of the Bethel-Missionary Society; Mother's Love in the Heart of Africa, 4 p., print, 1938; "The Usambara Association (the Settler) - A Memorandum on the Objectives and Objects of this Association, June 1938

Correspondence from Rorarius, accounts, etc.; "Christmas Greetings from Bethel, 4 p., printed, December 1935; flyer "We have promised our help from Friedrich von Bodelschwingh with an essay "Das rufende Land (Usambara) von Rorarius, September 1935

Contains among other things: "Usambara Mail" 5th Vol. No. 12 Printed, 27.1.1906

Personalia, licence of registration, certificates, curriculum vitae, 1925; instructions and vows of secondment, 1926; correspondence, reports, etc., 1925-1937 and 1955-1970; travel diaries and reports, also by Marie Müller, née Grießbach and circulars from Bumbuli, 1926-1937; photo of the hospital staff, 1929; house rules of the Bumbuli-Hospital (print), 1929; attacks by Doctor Fregonneau against the activities of Doctor Müller, newspaper campaign u. Korrespondenz, 1933-1934; Auseinandersetzung Deutscher Bund in Ostafrika, allem wegen Schulfragen, 1934; "Grundsätzliches zur Missionsarbeit in Usambara, 12 p., ms. 1934; correspondence from the office of the president concerning Doctor Müller, 1935; "On the financial statements 1934 of the printing works in Wuga by O. Joppe, 1935; 2 newspaper clippings with reports on lectures by Samuel Müller, 1937; "My son Mika von Samuel Müller, 1937; "Basic information on mission work in Usambara by Samuel Müller and statements thereon; activity reports 1934-1937

Letters, reports, accounts, 1911-1914; land register entry for the property at Panganiweg in Tanga, January 1911; monthly reports from Wound near Gombero and a report about a consecration of a church in Wound (only as fragment!), 1911; Chronicle of Magodi (Nngweneni), 1911-1912; thank-you letters from Yakobo Ngombe u. Hermann Kanafunzi as translations, 1912; Map sketch of the area in the south of Tanga, 1913; "How we found a house for the girls' school in the native quarter of Tanga by S. Delius, April 1913; individual documents from the years 1917, 1922 and 1929, including a report by Wohlrab on Tanga (Usambara), 1929; "Ein Kampf um Tanga - Bericht über den Tod von Missionar Günther (Druck), 1915