The Siberian handbooks published by M. I. undoubtedly present the fullest and most accurate date on routes of transportation in that country to be found anywhere save only in the archives of the Russian, Japanese, and German armies. The handbook entitled _Southwestern Russia_ contains minute descriptions of all the ports on the Black Sea from Varna, in Bulgaria, around to Batoum, in the Caucasus. It also contains such information as would be required by an expedition in regard to the selection of ports for the disembarkation of troops and supplies, the garrisoning of these ports, and their maintenance as bases for operations in the interior. In August, 1918, when the American Expeditionary Force was about to set sail for Vladivostok, the Military Monograph Subsection was suddenly called upon to furnish the staff of the expedition with a handbook on eastern Siberia. Though much of the necessary material was contained in documents which had not yet been translated, and though there were available only a few persons who were intimately acquainted with the region in question, the subsection, by placing its entire personnel at the task and by working eighteen hours a day, succeeded in producing a preliminary but really admirable little handbook which was mimeographed in time to go with the expedition. It is scarcely necessary to add that the preparation of these monographs demanded men of exceptional ability who possessed wide and intimate knowledge of the regions whereof they wrote. In order to provide such a corps of writers, commissions in the Military Intelligence Division were given to travellers, explorers, authors, scientists, archæologists, and others whose work or pleasure had acquainted them with the world’s far places.