Rare harpsichords, voices of other eras

CENTREVILLE, Del. - Something about harpsichords invites their owners and champions to regard them as living creatures. Certainly, the exceedingly rare specimens being played at Brandywine Baroque's Dumont Concerts series today and tomorrow have maneuvered through the centuries, quirks intact, heroically cheating the formidable odds posed by some of Western civilization's greatest calamities.