A vivid dream inspired Louise Kelley’s latest play, “Harriet and Ruth,” about Maryland-born abolitionist Harriet Tubman and a fictional friend, Ruth Schreiben, a Jewish widow. “In the dream, I was observing Harriet Tubman coming up to a roughly built but substantial house in the woods. “But the story itself and the quotes from Harriet Tubman were magnificent, because, of course, she was well known as an orator.” Figuring out how to make the Jewish woman, Ruth, feel authentic also took research. I don’t think we can have too many stories about Harriet Tubman.”