Among the survivors of the Titanic were two boys who were unclaimed by any adult. They were very young, 2 and 3 years old, and they spoke no English, so the two became a brief media sensation as authorities sought to locate their parents. They turned out to be Edmond and Michel Navratil, sons of a French tailor who had spirited them away from their mother and booked a passage under an assumed name. When the ship hit the iceberg, “He dressed me very warmly and took me in his arms,” Michel recalled. “A stranger did the same for my...