Correspondence; De Sumatra-Post, No. 126 No. 130, 1911; Correspondence with mission commissioner in Rotterdam, de Bilt-Station, Amsterdam, Leiden; newspaper articles (copies) on the question of financial support for schools in the Netherlands.India by the Government, 1895-1911; Report Miss. van Asselt on Relations of the RMG to Dutch Friends of Missions, 10 p., ms., ca. 1900; Keynote Speech on Cooperation of Dutch Aid Society for Barmen m. d. holl. Missionsgellschaften, 15 p., ms., 1912; Manifesto of the Dutch Anti-War Council, Dr., 1914; Guarantee of the RMG to Dutch citizens who, in favour of the RMG at Nederl. Handels Maatschappij Guarantee sums have subscribed, 1917

Germany: Prisoners, including: German prisoners in British or British Empire custody, including: Sentences passed on German prisoners at Pietermaritzburg, Union of South Africa. Ration scale at Pietermaritzburg Camp. Reports on internment camps at Alexandra Palace, London; Frith Hill, near Frimley, Surrey; Leigh, Lancashire; Dorchester; and Donington Hall, Derbyshire. Internment camp at Knockaloe, Isle of Man: adverse German press cuttings from Kölnische Zeitung of 16 July 1916 and National Zeitung of 19 July 1916. Reports by US Embassy officials on their visits from 31 August to 6 September 1916 and on 28 and 29 November 1916 (the latter including the Isle of Man Insane Asylum and the Private General Hospital, Isle of Man). Detention barracks at Trial Bay, New South Wales, Australia. Otto Mueller: his alleged ill-treatment while detained in Canada. Printed despatch from the Government of India concerning the treatment of German subjects at Ahmednagar Camp. Lieutenant Thomas von Grote: his sentence remitted by the Army Council; returned to internment in the officers' camp at Holyport, Berkshire. Camp for civilian prisoners at Glendairy, Barbados, West Indies. Labour of German prisoners in Canada. Treatment of German prisoners in Jamaica and South Australia. Reports on working camps at Lentran, Inverness-shire; Nethybridge, Inverness-shire; Kinlochleven, Argyllshire; Redesdale, Newcastle upon Tyne, Northumberland; Healeyfield, Castleside, Durham; Newlandside, Stanhope, Durham. Treatment of German soldiers serving punishment sentences. Report on place of internment for alien civilians at Gainsborough Road, Hackney Wick, London. Housing of German prisoners in Britain: insistence by German Government that barracks replace tents, otherwise reprisals to be taken. Medical and dental treatment of prisoners in Canada. Internment camp at Brandon, Manitoba, Canada. Treatment of German prisoners in hospitals in Britain. Restrictions on visitors' interviews at Liverpool Camp, New South Wales, Australia. Report on outbreak of gastro-intestinal disorder at Lower Southern Hospital at Dartford, Kent; US Embassy visits to hospitals at Dartford and Devonport requested. Flogging of Germans at Rabaul, New Britain. Gefreiter Julius Koch and Unteroffizier Heinrich Brinkmann: their complaints about conditions of punishment for attempting to escape refuted by War Office. Internment camp at Torrens Island, South Australia. Code 1218 File 591 (papers 180902-end).

Discussion of his book "Der Griff nach Indien" about the origin of the English colonial empire; Dresdner Anzeiger 1.5.1936, Deutsche Allgem. Ztg. 29.4.1936