Correspondence with the BBC about his broadcast 'India Remembered' (1957) and other possible broadcasts; miscellaneous correspondence with other media organizations
Cuttings, photographs and negatives of Thibaw, last King of Burma, Queen Sapalayat, their daughters, other members of their family and attendants, and their residence at Ratnagiri, Bombay, collected by Symington as illustrations for his book on Thibaw
Papers as Director, Northern Rhodesian Chamber of Mines, including articles by Symington on the parallels between Indian constitutional development and the Central African Federation, and on the employment of African labour in the Copperbelt and the Employers' negotiating machinery
Correspondence with the IOLR about his contribution to the District Officers' memoirs, and with the Imperial War Museum and BBC about his contribution to the 'Plain Tales from the Raj'
Letters from Mrs Taw Phaya (Princess Rita, granddaughter of King Thibaw), Professor Walter S Desai, and others, chiefly concerning information for Symington's book on Thibaw, last King of Burma
Paper by Hugh Trevor Lambrick on 'Prospects for a united India after the cessation of British rule, as they appeared in Sind 1930-46' Dated as: (? 1969)