These type:letters are still monographs
- Peter Damian. Letters 1–30. Edited by Thomas P. Halton. Translated by Owen J. Blum. Vol. 1. The Fathers of the Church Medieval Continuations. Washington, D.C.: The Catholic University of America Press, 1989.
- Peter Damian. Letters 31–60. Edited by Thomas P. Halton. Translated by Owen J. Blum. Vol. 2. The Fathers of the Church Medieval Continuations. Washington, D.C.: The Catholic University of America Press, 1990.
- Peter Damian. Letters 61–90. Edited by Thomas P. Halton. Translated by Owen J. Blum. Vol. 3. The Fathers of the Church Medieval Continuations. Washington, D.C.: The Catholic University of America Press, 1992.
- Peter Damian. Letters 91–120. Edited by Thomas P. Halton. Translated by Owen J. Blum. Vol. 5. The Fathers of the Church Medieval Continuations. Washington, D.C.: The Catholic University of America Press, 1998.
- Peter Damian. Letters 121–150. Translated by Owen J. Blum and Irven M. Resnick. Vol. 6. The Fathers of the Church Medieval Continuations. Washington, DC: The Catholic University of America Press, 2004.
- Peter Damian. Letters 151–180. Edited by Gregory F. LaNave. Translated by Owen J. Blum and Irven M. Resnick. Vol. 7. The Fathers of the Church Medieval Continuations. Washington, D.C.: The Catholic University of America Press, 2005.
- Coverdale, Miles, ed. The Letters of the Martyrs: Collected and Published in 1564. London: John Farquhar Shaw, 1837.
- Abelard, Peter, Heloise. The Love Letters of Abelard and Heloise. Translated by Ralph Fletcher Seymour. Chicago: Geo. F. McKiernan & Co., 1903.
- Teresa of Ávila. The Letters of Saint Teresa. Translated by Benedictines of Stanbrook. Vol. 1. London: Thomas Baker, 1919.
- Teresa of Ávila. The Letters of Saint Teresa. Translated by Benedictines of Stanbrook. Vol. 2. London: Thomas Baker, 1921.
- Teresa of Ávila. The Letters of Saint Teresa. Translated by Benedictines of Stanbrook. Vol. 3. London: Thomas Baker, 1922.