On the stage of the dance theater at Jacob's Pillow, Mass, stood an erect, grey-haired little woman, smiling before the skirl of applause. As it drummed on, she leaped from the stage like a 20-year-old ballerina. "You can't imagine," said 71-year-old Marie Rambert, "with what fear and trembling we came here." Occasion: the U.S. debut of the Ballet Rambert, Britain's oldest dance company.
Although Britain's Royal Ballet is much better known to the public, the 33-year-old Rambert company is more revered by balletomanes as the most important modern breeding ground of British choreographers and...