Papers of the Sykes family of Sledmere > Papers of Sir Mark Sykes (1879-1919) (Second deposit of Papers of the Sykes family) > Correspondence > File of general correspondence. Letters and telegrams to Mark Sykes > Statement from the Society of Friends in Malton, signed by J. W. Rowntree, Clerk, referring to the growth and manufacture of opium in India for export to China and urging His Majesty's Government to intervene.