Draft of a proposed Commercial Treaty between Her Majesty the Queen of Great Britain and Ireland, and the Shah of Persia Printed for the use of the Foreign Office, 17 Jan 1857
Transkaspien und seine Eisenbahn. Nach Acten des Erbauers Generallieutenant M Annenkow bearbeitet von Dr O Heyfelder Hannover: Helwingsche Verlagsbuchhandlung, 1888
Report of a mission to Chinese Turkistan and Badakhshan in 1885-86. By N Elias, Political Agent on Special Duty Calcutta: [Govt of India Foreign Dept], 1886