By the aid of R---, the secretary of an important labor union, I have gathered much valuable material for the Expedition. R--- is a Menshevik who has in some unexplained manner escaped the recent "cleaning process." His known popularity among the workers, he believes, has saved him. "The Bolsheviki are keeping an eye on me, but they have left me alone so far," he said significantly. Familiar with the city, its museums, libraries, and archives, R--- has been a great help in my quest for data and documents. Much that is valuable has been lost, and still more has been destroyed by the workers themselves, in the interests of their safety, at the time of German occupation and White Terror. But a considerable part of the labor archives has been preserved, sufficient to reconstruct the history of the heroic struggle of the unions since their inception and throughout the stormy days of revolution and civil war. All through the Mensheviki played the rôle of the intellectual l...