The Soviet Union and the United States are cleaning out their attics.

The Soviets returned 6,000 pages of records left behind when the United States closed its embassy at Leningrad during the Russian Revolution, the National Archives said.Yurly Khomenko, deputy chief of mission of the Soviet Embassy in Washington, presented the records Oct. 31 to William Slany, State Department historian and Trudy Huskamp Peterson, assistant archivist for the National Archives.

The United States has returned the favor.

In April 1989, U.S. officials turned over the first two boxes of original files of the Imperial Russian Consulates in Chicago, San Francisco, Honolulu, Philadelphia, Portland, Ore., and Seattle.