Ruth Tiffany Barnhouse

While still a full-time psychiatrist and mother, Barnhouse became involved in the Episcopal church in her town. She enrolled part-time at the Weston College of Theology in Cambridge, Massachusetts, and became a full-time resident in 1973 on track to obtain a master's degree in theology. However, after the Episcopal Church allowed the ordination of women in 1976, she was ordained a deacon in 1978 and a priest in 1980. She then taught at Southern Methodist University's Perkins School of Theology.

In 1953, when she was a resident psychiatrist at McLean hospital, she developed a relationship with a college-aged Plath. Later, when Plath published The Bell Jar, Barnhouse was reincarnated as the character Dr. Nolan, the protagonist's psychiatrist during her stay at a mental hospital. According to Barnhouse, Plath was one of her first patients. They would stay in touch long after Plath left McLean, up until one week before Plath's death.

Ruth Tiffany Barnhouse (October 23, 1923 – May 5, 1999), also known by her married name Ruth Beuscher, was an American psychiatrist, theologian, and Episcopal priest. Best known for being the psychiatrist of Sylvia Plath, she corresponded with her since they met at McLean Hospital in Belmont, Massachusetts following Plath's breakdown in 1953. Though Plath destroyed most of their letters, fourteen from Plath to Barnhouse remain (not including the two from Barnhouse to Plath in the Sylvia Plath papers at Smith College).

Barnhouse was born to American parents near Grenoble, France, in 1923. The family moved to Philadelphia when she was two. Her father, Donald Grey Barnhouse, took up a teaching position at the University of Pennsylvania and was pastor of the Tenth Presbyterian Church in Philadelphia from 1927 to 1960 (see Wikipedia article). She was homeschooled by her grandmother Tiffany, whose late husband was a distant cousin of the founder of Tiffany & Co. With a high IQ, Barnhouse was admitted to Vassar College at fourteen and enrolled at sixteen. Meanwhile, she had met her first husband, Francis C. Edmonds, Jr., at a religious retreat. Francis graduated from Princeton University in 1940. They eloped in 1941 after her father forbade them from marrying. Shortly thereafter she regretted her marriage but was hesitant about ending it because she was pregnant. In 1943 she gave birth to a second child. In 1944, at twenty-one, she enrolled at Barnard College, where she completed her bachelor's degree, and continued on to Columbia University Medical School, where she earned a medical degree. She left Francis towards the end of her first year at Barnard. He, then a medical doctor, assumed full responsibility for the children. His parents took care of them until the divorce went through and he had remarried in 1947. Divorce and child custody were topics Barnhouse would later discuss in her letters to Plath.