Range of themes, but unity, by Gerhardt at Library of Congress

Many themes unified the concert that German cellist Alban Gerhardt played Saturday afternoon at the Library of Congress. All of the music he performed was from the 20th century, most of the composers were American, and many of the pieces were composed for Mstislav Rostropovich. The choices were to Gerhardt's credit but, as in his last appearance with the Baltimore Symphony Orchestra in June, the results were mixed.