The Uptown Mandolin Quartet, based in Lawrence, is celebrating its 40th Anniversary with a concert at Lawrence Public Library on Tuesday night. They stopped in to KPR's Performance studio to give us a preview. Click on Listen to enjoy the music of Respighi, Bach, O'Carolan and Edward German, performed by Beth Dearinger and Mike Stewart, Mandolin; Charles Higginson, mandola; and group founder Jeff Dearinger, mandocello.