Hitchcock's I.D.? Going Once ...

Summer is the season, it seems, for hawking history's private treasures. Up for bid this month are knickknacks from the estates of Kate Hepburn and Doris Duke, as well as some 400 items from Barbra Streisand's collection of costumes and memorabilia from her career. And for boat buffs, a New York City auction includes the biggest lot of Titanic remnants ever assembled, plus relics from other sunken ships like the Lusitania and the Andrea Doria.

--By Jeremy Caplan

KATHARINE HEPBURN June 10

The star wore this velvet 1928 BABANI WEDDING DRESS when she got married in her parents' living room....