Indian opium exports to China
Sino-British Opium Agreement and the end of the India-China opium trade
Agreement of 1907 provided for a phased reduction of Indian opium exports to China by one-tenth each year over ten years from 1908; the trade ended in 1913. NOT verified by me against a primary text in this pass, the Statistical Abstract series I could read stops at 1903-04.
UnconfirmedOfficial record. Source: Not found in the sources I read; would need the India Office opium files and the 1908-1913 Statistical Abstracts
