Samuel L. Clemens, aka Mark Twain, arrived in Hartford, Connecticut, in August 1867. He was there to see the publisher of his new travel book, The Innocents Abroad, and fell in love with the city. "Of all the beautiful towns it has been my fortune to see this is the chief," he wrote to his San Francisco newspaper. At the time, Hartford was a manufacturing, insurance, and banking center. Clemens ultimately settled there, built an ornate mansion, raised...