This volume is the second of a series which will present every available bilateral diplomatic instrument to which the Soviet Government has become a party since 1917. It is not a critical selection, but as complete a record of Soviet policy as time and facilities in this country and in Great Britain have permitted. Certain documents are listed as coming from "private sources". We are not at liberty to identify these sources further, but we are fully satisfied that the information which we received is authentic. In a few cases, texts and summaries of documents we sought could not be found. The subjects of these, however, are such that their unimportance seems assured.
The documents are presented chronologically, each with a number to establish its position and simplify reference. Place and date of signature, and of ratification where pertinent, are indicated at the head of the treaty or agreement. The signatures of the governmental representatives are included in the place where they first appear in the original text.
The texts of some documents were omitted because they followed verbatim or mutatis mutandis others already included in our compilation. Annexes of great detail and relative insignificance have also been deleted.
At the appendix is an Exchange of Notes between Germany and R. S. F. S. R. constituting a Secret Protocol to the supplementary Treaty of August 27,1918. This document was uncovered subsequent to the publication of Volume I.
Translation was manifestly our most difficult problem. Official translations or those from reliable sources were used wherever possible, and were compared with the Russian text if one was available. In translations directly from Russian and other foreign languages, we have attempted to combine accuracy with idiomatic English, but we were often forced to be literal in order to be precise. For these translations, of course, we claim no official authority. The Russian texts were found to be frequently in error: we have corrected this where possible by comparison with other versions.
I continue to owe a heavy debt of gratitude and thanks to the many friends and scholars mentioned in Volume I, who again gave generously of their time and knowledge towards the completion of this work. I wish to add my thanks and gratitude to Jane Degras who advised and assisted me on the research facilities available in London, particularly at the Royal Institute of International Affairs; to John F. Wallerstedt, who kept things going at home while contributing to the overall development of Volume II, during my sojourn in Europe; and finally to my close friend and scholar, Thomas L. Lalley, who continued to contribute endless hours in assisting and advising me with the research, documentation, translations and finalization of this volume.
Georgetown University, May 1955
Leonard Shapiro . . .