Andrzej Paczkowski, professor of history in the Political Studies Institute of the Polish Academy of Sciences, and his country’s most respected authority on Communism, is in residence in the Hoover Tower during the month of May. He is surveying and exploring Hoover’s extensive research collections on modern Poland. Paczkowski’s historical works, some of which have been translated into English (The Black Book of Communism, and The Spring will be Ours: Poland and the Poles from Occupation to Freedom), are well known to specialists. Much less is known about the Polish historian’s past as one of the underground archivists of “Solidarity,” the premier pro-democracy movement in all of the former Soviet Bloc, and about his important role in building Hoover’s Polish collections.