Changes

 *[http://www.archive.org/stream/tentlifeintigerl00ingliala#page/n5/mode/2up ''Tent Life in Tigerland with which is incorporated Sport and Work on the Nepaul Frontier : being twelve years' sporting reminiscences of a pioneer (indigo) planter in an indian frontier district''] by James Inglis 1892. ''Sport and Work on the Nepaul Frontier'' was first published 1878. Archive.org

 *[http://www.merchantnetworks.com.au/periods/1800after/1827indigo.htm Decline of Indigo business in India] from [http://www.merchantnetworks.com.au/sitemap.htm Merchant Networks]