In 1939, a 29-year old stockbroker rescued 669 Czechoslovakian children before the Nazi invasion. Winton kept quiet about his humanitarian exploits, until his wife Grete found a detailed scrapbook in their attic in 1988. It contained lists of the children, including their parents’ names, and the names and addresses of the families that took them in. By sending letters to these addresses, 80 of “Winton’s children” were found in Britain. Here is a clip from “That’s Life” with Nicholas Winton.
http://en.wikipedia.org/wiki/Nicholas_Winton