Robert Todd Lincoln, the only son of Abraham Lincoln to live to adulthood, built the Greek Revival mansion he called Hildene in Manchester, Vt., in 1905. The home served as a getaway for the family based in Illinois. Here is the dining room. (Associated Press)

Robert Todd Lincoln, the only son of Abraham Lincoln to live to adulthood, built the Greek Revival mansion he called Hildene in Manchester, Vt., in 1905. The home served as a getaway for the family based in Illinois. Here is the dining room. (Associated Press)