File R 289/1881 - Cinchona Bark Certificates of the Analytical Laboratory, Westminster, dated 13th April 1881, acknowledging samples of cinchona bark received from the India Office, ex Eldorado, and showing results on analysis
File R 293/1881 - Correspondence regarding the examination of tasar silk and Indian dyestuffs and a letter expressing dismay over a firm contracting 50,000 lbs. of “tusser” silk from China instead of from India