Summary: Episode No. 348 is a holiday weekend clips episode with curator Betsy Kornhauser. Along with Tim Barringer, Kornhauser is the co-curator of "Thomas Cole: Eden to Empire," which is at the National Gallery in London through October 7. Barringer and Kornhauser's show examines Cole's origins in the north of England during the Industrial Revolution and the impact Britain and Cole's travels through England and Italy had on his American career.