Mary Catherine Chase (religious, Sister Mary Francis de Sales, of the Sisters of the Visitation; pen names, Winnie Rover and F. M. Edselas; 1835 – c. 1905) was a 19th-century American Catholic nun and writer. A fervent Episcopalian for years, she was later influenced by a Catholic woman and entered an enclosed order. Starting in 1874, she wrote under the pen name "Winnie Rover", switching to "F. M. Edselas" in 1892, when she became a frequent contributor of reminiscences of Ralph Waldo Emerson, Nathaniel Hawthorne, and other great writers.^[1]

Mary Catherine Chase was born in Pepperell, Massachusetts, on July 1, 1835, or July 1, 1836.^[a] She had one sister, Sarah Augusta Chase (b. 1834).^[3] Chase lost her mother as an infant, and was raised by two maternal aunts. First home-schooled, she was later educated in the schools of Springfield, Massachusetts, at Mount Holyoke College, and at the State Normal School of Westfield, Massachusetts, from which she graduated in 1855.^[2]

At the age of 19, and under the spiritual guidance of Rev. Alexander Hamilton Vinton, D. D., she was confirmed in St. Paul's Church, Boston, and remained for years a fervent Episcopalian.^[2] She was a granddaughter of Bishop Philander Chase, and the only known member of the Chase family who later renounced Episcopalianism,^[1] after she became a Catholic and a nun.^[4]

Having chosen the vocation of a teacher, she drifted to the west. There she met a Catholic woman who influenced her. After entering an enclosed order, Chase took a religious name, but she also felt urged to contribute to literature for young Catholics, and using the pen name of "Winnie Rover", she published books of travel for children, the "Neptune Series", as well as several dramas, and various manuals for the classroom, notably Practical Science.^[2]

After 1892, using the pen name of "F. M. Edselas" – an anagram of her religious name, Mary Francis de Sales^[5] – she wrote upon subjects of public interest, giving the general impression that the writer was a man, writing such works as "How to Solve a Great Problem", "Institute of Woman's Professions", "Educational Bureau and Journal". The appearance of these articles in a leading Catholic periodical, and the favorable comment they received, resulted in her being chosen as one of the contributors to the Columbian Catholic Congress. Her paper was upon "Woman's Work in Religious Communities". Later, she gained new admirers in the literary world with, "A Visit to Ramona's Home", "In a City of the Clouds", "Constantine Zrumidl", and "What Shall We Do With Our Girls?"^[2]

She died c. 1905.^[6]

• This article incorporates text from this source, which is in the public domain: McBride, D. H. (1897). Immortelles of Catholic Columbian Literature: Compiled from the Work of American Catholic Women Writers (Public domain ed.). D. H. McBride.
• This article incorporates text from this source, which is in the public domain: McGlashan & Gill (1898). The Irish Monthly. Vol. 26 (Public domain ed.). McGlashan & Gill.
• This article incorporates text from this source, which is in the public domain: Richards, Joseph Havens (1913). A Loyal Life: A Biography of Henry Livingston Richards, with Selections from His Letters and a Sketch of the Catholic Movement in America (Public domain ed.). B. Herder. p. 34.
• This article incorporates text from this source, which is in the public domain: Rosary Press (1908). "Convert Sons of Kenyon by Scannell O'Neill". The Rosary Magazine. Vol. 32 (Public domain ed.). Rosary Press.
• This article incorporates text from this source, which is in the public domain: Wagenen, Avis Stearns Van (1901). Stearns Genealogy and Memoirs (Public domain ed.). Courier Press Company.

• Kane, Paula M. (10 October 2017). Separatism and Subculture: Boston Catholicism, 1900-1920. UNC Press Books. ISBN 978-1-4696-3943-7.

• Works by or about Mary Catherine Chase at the Internet Archive