their second son, webb, was a founder of union carbide and became quite wealthy. he's the gentleman who started the rutherford hayes presidential center, which opened in 1916. >> their third son, rutherford, became a real estate developer in north carolina and in florida. and their fourth son, scott, worked for general electric out of first, cincinnati, and then out of schenectady, new york. >> kathy robinson wants to know, did the hayeses build additions to spiegel grove after returning from the white house? and i have another tweet, which i can't call up very quickly, but someone asked, did the hayeses have any pets? and the answer is, boy, did they. >> yes, they did. well, they did add to the house. in 1880, they added three bedrooms, a large drawing room, and a library, and then in 1889, unfortunately, lucy never saw the back addition to the home, which had four more bedrooms and a large dining room. >> they had pets. they had in the white house, they had a mockingbird, a goat, couple of dogs. they had the first siamese cat in the united states. it was given t