Changes

==Historical books online==

*''Routes in Asia''. Office of Quarter Master General in India. [https://books.google.com.au/books?id=TfD2sIfC5F8C&pg=PP7 ''Section 6. pt. 1. Routes in Nepaul. pt. 2. Routes in Bhutan. pt. 3. Routes in Sikhim. Pt 4. Routes in Thibet. pt. 5. Routes in Burmah. pt. 6. Routes between Assam and Burmah''] compiled ... by H.S. Brownrigg, Rifle Brigade. 1878 Google Books

*[https://hdl.handle.net/2027/uc1.a0009787946?urlappend=%3Bseq=9 ''Sikkim. With hints on mountain and jungle warfare. Exhibiting also the facilities for opening commercial relations through the state of Sikhim with Central Asia, Thibet, and western China''] by Colonel J. C. Gawler 1873 HathiTrust Digital Library. Also available as a pdf download [http://pahar.in/wpfb-file/1873-sikhim-with-hints-on-mountain-and-jungle-warfare-by-gawler-s-pdf/ PAHAR Mountains of Central Asia Digital Dataset].

*[http://hdl.handle.net/2027/hvd.32044107242968?urlappend=%3Bseq=9 ''Report on a visit to Sikhim and the Thibetan frontier in October, November, and December 1873''] by J. Ware Edgar, Offg. Deputy Commissioner of Darjeeling. 1874 Hathi Trust Digital Library.