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 > Letter from Thomas Cox, Secretary, The National Unionist Association of Conservative & Liberal Unionist Organizations, Unionist Central Office, St Stephen’s Chambers, Westminster, S.W., about the Annual Conference.