File R 150/1881 - Correspondence regarding the arrangements for the analysis of samples of cinchona bark collected by Robert Cross while on a visit to the Government Cinchona Plantations
File R 158/1881 - Correspondence regarding the experimental manufacture of quinine from a portion of a consignment of cinchona bark from the Nilgiri plantations
File R 192/1881 - Correspondence regarding a request by the Government of India, Home, Revenue and Agricultural Department, for the collection of Indian timbers made by the Schlagintweit brothers, which were transferred from the India Museum to the Royal Botanic Gardens at Kew, be transmitted to India
File R 193/1881 - Correspondence regarding copies of correspondence on the subject of the utilisation of bamboo forwarded to Sir Joseph Hooker for his information