Learning Series: Era of the Summer Estates, Interview with Mary Cassidy Posted on May 27, 2020 by Julie Travers Swampscott’s Gilded Age is brought to life in this discussion with Historian Mary Cassidy. Mary highlights the Era of the Summer Estates as she discusses the homes and lives of the wealthy Boston families who summered here in the 1800’s and early 1900’s.Read the transcript here.