**ADVANCE FOR TUESDAY, JULY 17** Adrian and Elizabeth Reddall of England, left, and second from left, and Pun Siu Kay of Singapore and Eva Martin of South Windsor, Conn., far right, and second from right, listen to historic interpreter Martha Czernicki in the library of The Mark Twain House in Hartford, Conn., Wednesday, June 4, 2008. Mark Twain, Edith Wharton and a host of other boldfaced names among the dead have something in common with living Americans in these hard financial times: Their homes are in jeopardy. For scores of historic house museums, simply keeping the lights on has become a challenge. (AP Photo/Jessica Hill)