A recent Article for examiner.com briefly discusses Louise Brooks and some of the actors and actresses who worked both in silent and sound films. The article, a review of Roy Liebman's From Silents to Sound: A Biographical Encyclopedia of Performers Who Made the Transition to Talking Pictures (McFarland), can be found at www.examiner.com/x-7605-SF-Silent-Film-Examiner~y2009m6d16-From-silents-to-sound--book-details-tipping-point-in-Hollywood-history  Check it out!