Transcriptions of source material and notes by Douglas on Elizabethan and Stuart journalism, [1935-1954], mainly comprising typed transcriptions of newspapers, pamphlets and similar sources of news, 1566-1622, with associated notes and references by Collins, and including typescript of 'Elizabethan journalism, 1590-1610' by Collins; manuscript and typescript introduction, table of contents and bibliography of A Handlist of News Pamphlets, 1590-1610 (Walthamstow South-West Essex Technical College and School of Art, London, 1943) by Collins; file of correspondence with archivists (mainly at Essex Country Record Office, the Bodleian Library and Chester City Record Office), concerning sources of Elizabethan and Stuart journalism and pamphlets, 1948-1954, with a manuscript copy of an interim report on the subject, [1949]; notebook containing research on the early modern postal service; manuscript notes on Sixteenth Century French news pamphlets and related material, including research undertaken on Collins' behalf by Robert J North, with covering letters from North to Collins, 1934.

Papers of Lt Col Leonard George Gage, on service with Army Postal Service, 1939-1945; principally comprising correspondence on the introduction and operation of the airgraph service to the Middle East; letters of congratulation on mention in despatches, 1941, and award of MBE, 1944; photographs of army postal services in France, 1939-1940 and the Middle East, 1942-1945; copy of Parade No.124, 26 Dec 1942, containing illustrated article 'Mail Up for Christmas'