LEAGUE OF NATIONS PAPERS. Vols. III A, B. Reports, maps and correspondence, issued by the European Commission of the Danube, the Rumanian Hydraulic Service, and the International Congress of Navigation; 1889, 1926.
Vol. III A (ff. 187). Reports, with related maps and correspondence; 1889, 1926. includes: f. 129 Sir Charles Augustus Hartley, civil engineer: Memorandum concerning the navigation of the Danube of Sir Charles Augustus Hartley: 1889: Copy.