Publisher: International Institute of Social History, 1917-1923 . — 250 s. Photocopies of letters 13 December 1918 - 9 April 1921. Correspondence 28 November 1917 - 7 November 1918In December 1935, Trotsky sold about 800 documents. covering the period 1917-1922 (containing hundreds of letters, telegrams and memoranda , which Lenin and Trotsky exchanged with each other. IISH (International Institute of Social History / Internationaal Instituut Voor Sociale Geschiedenis , Amsterdam). This collection was called by Trotsky himself "Lenin's Correspondence with Trotsky", which also included communications with others. In 1939, the papers were evacuated to Oxford and only after World War II returned to Amsterdam, the text of the documents was published as "The Trotsky Papers", Part I (1917-1919) / "Trotsky Papers", Part 1 (1917-1919), Mouton & Co. 1964 and Part II (1920-1922), Mouton, 1971, in The Hague by Jan Majer.