Beware the morality lesson of the Dolly Twins, once the dancing rage of the Jazz age, so beautiful they drove millionaires to near bankruptcy, consorted with kings, gambled lavishly, and died miserably. An ivory and bronze sculpture of them by Demetre Chiparus will be auctioned by Bonhams in London in November. High estimate is $300,000.Identical twins born in Budapest, Rosie and Jenny were brought to the U.S. in 1905 by emigrant parents, and rose from vaudeville to become as famous as Britney and Beyonce across the continents. But the jazz age passed, as did their money. Jenny hung herself in 1941. Rosie tried in 1962 but failed, dying unhappily in 1970.