The Gilded Age Heiress The Gilded Age Heiress Who Suddenly Died on Horseback: Mary Harriman Rumsey.magine you are an heiress in the Gilded Age in a seemingly unlimited wealthy family – and then it all comes crashing down, literally, in an unexpected accident. This is the tale of Mary Harriman Rumsey.The Sad Socialite Whose Son Took Her Life: The Barbara Baekland Tragedy: • The Sad Socialite Whose Son Took Her …