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Corpus Christi Watershed

Pope Saint Paul VI (3 April 1969): “Although the text of the Roman Gradual—at least that which concerns the singing—has not been changed, the Entrance antiphons and Communions antiphons have been revised for Masses without singing.”

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Views from the Choir Loft

Medieval Manuscripts

Jeff Ostrowski · November 18, 2024

High Resolution Scan • “Missale Romanum” (1857)

This rare missal from 1857 contains some musical notes.

Corpus Christi Watershed · December 25, 2021

“Merry Christmas!” • From Our Family To Yours

Dear readers, thank you for everything!

Jeff Ostrowski · May 12, 2021

Being Too Hard On Priests?

…including a fancy capital “A” from a medieval manuscript.

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Jeff Ostrowski · April 4, 2021

(Hymn) • “Jesus Christ Is Risen Today”

…including rehearsal videos for each individual voice.

Jeff Ostrowski · March 19, 2021

Saint Joseph + Baby Jesus In A Walker

This luscious manuscript was created about A.D. 1453 for a French Noblewoman.

Jeff Ostrowski · March 4, 2021

Now Online! • “Missale Romanum” (1615 edition)

How ironic that this is being hosted by the Martin Luther University!

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Jeff Ostrowski · August 28, 2020

“Resplendent Beyond Reckoning” • Sherborne Missal (1399AD)

As the Isaac Jogues Missal would do 650 years later, this Missal provides pictures of the priest during the Canon!

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Jeff Ostrowski · January 15, 2020

What Palestrina Did With Kyrie II (“Fons Bonitatis”)

Many erroneously believe the Kyrie was the only thing troped, but that’s not even close to true.

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Jeff Ostrowski · October 10, 2019

Incredible!!! • Ancient Kyriale MSS for Download

Through the centuries, we observe a remarkable stability—in spite of variants, which will always exist.

Jeff Ostrowski · September 20, 2017

PDF Download • “Missal for the Laity” (1846)

Have you noticed liturgical progressives are never happy?

Jeff Ostrowski · July 6, 2015

The Beauty Of Ancient Catholic Manuscripts

Medieval manuscripts were normally created by (at least) two monks: one drew, one wrote.

Jeff Ostrowski · April 6, 2015

Jaw-Dropping Liturgical Manuscripts (7,055 Pages)

Catholics can now *see with their own eyes* the antiquity of our liturgy.

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Corpus Christi Watershed

President’s Corner

    PDF Download • “Ubi Caritas” (SATB)
    I remember singing “Ubi Cáritas” by Maurice Duruflé at the conservatory. I was deeply moved by it. However, some feel Duruflé’s version isn’t suitable for small choirs since it’s written for 6 voices and the bass tessitura is quite low. That’s why I was absolutely thrilled to discover this “Ubi cáritas” (SATB) for smaller choirs by Énemond Moreau, who studied with OSCAR DEPUYDT (d. 1925), an orphan who became a towering figure of Catholic music. Depuydt’s students include: Flor Peeters (d. 1986); Monsignor Jules Van Nuffel (d. 1953); Arthur Meulemans (d. 1966); Monsignor Jules Vyverman (d. 1989); and Gustaaf Nees (d. 1965). Rehearsal videos for each individual voice await you at #19705. When I came across the astonishing English translation for “Ubi Cáritas” by Monsignor Ronald Knox—matching the Latin’s meter—I decided to add those lyrics as an option (for churches which have banned Latin). My wife and I made this recording to give you some idea how it sounds.
    —Jeff Ostrowski
    PDF • “Cantus Mariales” (192 pages)
    Andrea Leal has posted an absolutely pristine scan of CANTUS MARIALES (192 pages) which can be downloaded as a PDF file. To access this treasure, navigate to the frabjous article Andrea posted Monday. The file is being offered completely free of charge. The beginning pages of the book have something not to be missed: viz. a letter from Pope Saint Pius X to Dom Pothier, in which the pope calls Abbat Pothier “a man versed above all others in the science of liturgy, and to whom the cause of Gregorian chant is greatly indebted.”
    —Jeff Ostrowski
    Music List • (2nd Sunday of Lent)
    Readers have expressed interest in seeing the ORDER OF MUSIC I created for this coming Sunday, which is the 2nd Sunday of Lent (1 March 2026). If such a thing interests you, feel free to download it as a PDF file. This feast has magnificent propers. Its somber INTROIT is particularly striking—using a haunting tonality—but the COMMUNION with its fauxbourdon verses is also quite remarkable. I encourage all the readers to visit the feasts website, where the Propria Missae may be downloaded completely free of charge.
    —Jeff Ostrowski

Quick Thoughts

    Extreme Unction
    Those who search Google for “CCCC MS 079” will discover high resolution images of a medieval Pontificale (“Cambridge, Corpus Christi College, MS 079”). One of the pages contains this absolutely gorgeous depiction of the Sacrament of Extreme Unction.
    —Corpus Christi Watershed
    PDF Chart • “Plainsong Rhythm”
    I will go to my grave without understanding the lack of curiosity so many people have about the rhythmic modifications made by Dom André Mocquereau. For example, how can someone examine this single sheet comparison chart and at a minimum not be curious about the differences? Dom Mocquereau basically creates a LONG-SHORT LONG-SHORT rhythmic pattern—in spite of enormous and overwhelming manuscript evidence to the contrary. That’s why some scholars referred to his method as “Neo-Mensuralist” or “Neo-Mensuralism.”
    —Jeff Ostrowski
    PDF • “O Come All Ye Faithful” (Simplified)
    I admire the harmonization of “Adeste Fideles” by David Willcocks (d. 2015), who served as director of the Royal College of Music (London, England). In 2025, I was challenged to create a simplified arrangement for organists incapable of playing the authentic version at tempo. The result was this simplified keyboard arrangement (PDF download) based on the David Willcocks version of “O Come All Ye Faithful.” Feel free to play through it and let me know what you think.
    —Jeff Ostrowski

Random Quote

Ralph Vaughan Williams “was an atheist during his later years at Charterhouse and at Cambridge, though he later drifted into a cheerful agnosticism: he was never a professing Christian.”

— Dr. William Mahrt, CMAA President (2021)

Recent Posts

  • PDF Download • “Ubi Caritas” (SATB)
  • PDF • “Cantus Mariales” (192 pages)
  • PDF Download • Fourteen (14) Versions of the Splendid Hymn: “Salve Mater Misericordiae”
  • Fulton J. Sheen • “24-Hour Catechism”
  • Music List • (2nd Sunday of Lent)

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