Comments on the discovery of papers on Soviet socialism written by Leon Trotsky and his son, Lev Sedov, in the Boris I. Nicolaevsky Collection in the Archives of the Hoover Institution on War, Revolution, and Peace at Stanford University in California. Contribution of Leon Trotsky to the study of Russian history; Other repositories in which Trotsky papers can be found; Content of and period covered by the Hoover Institution papers.