Sketch Map of the Route of Capt. P.M. Bailey through South Eastern Tibet and the Mishmi Hills. Royal Geographical Society (reduced from 399) [1912]. 15.78 miles = 1 inch. With typewritten introductory note.
Tibet. Road Sketch, Gyantse to Karo La and Tibetan Wall, from road sketches by Captain H.M. Cowie, R.E., Survey of India, dated May 1904. Intelligence Branch Topo. Dy. No. 5,144, 1904. 4 miles = 1 inch.