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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

Abbot Joseph Pothier of Solesmes

Jeff Ostrowski · March 3, 2026

PDF • “Cantus Mariales” (192 pages)

This gorgeous PDF scan is being offered completely free of charge

Corpus Christi Watershed · February 24, 2026

Like! Like! Like!

You’ll never guess who gave us a “like” on Facebook!

Jeff Ostrowski · July 15, 2025

PDF Download • “Jeff’s Mom Joins Our Fundraiser”

Earlier this year, my mother found out we desperately needed funds and were planning to run a fundraiser…

Jeff Ostrowski · June 19, 2025

“Dom Jausions had a skilled hand. His transcriptions are masterpieces of neatness & precision.”

A few days ago, Dominique Gatté released something quite extraordinary.

Jeff Ostrowski · June 18, 2025

PDF Download • Palestrina’s “Ave Maria”

Including rehearsal videos.

Jeff Ostrowski · February 4, 2025

PDF Download • “Entrance Chant” for the 5th Sunday in Ordinary Time (Year C)

I would argue we must renew our good resolution and stand firm.

Jeff Ostrowski · November 20, 2024

PDF Download • “Entrance Chant” for this Coming Sunday (Christ the King) — 34th in Ordinary Time

Including three separate points on Dom Combe’s shameful and defamatory statement.

Jeff Ostrowski · May 21, 2024

Choir Members Can’t Get Enough of This Piece

An English translation of “Veni Creator Spiritus.”

Jeff Ostrowski · February 10, 2024

Must We “Love” All Gregorian Chant?

Where “Parce Dómine” (the famous song for Lent) came from.

Jeff Ostrowski · January 29, 2024

PDF Score • “Mass Setting I Wrote For Corrinne”

I demonstrate how the “Kyrie Eleison” can be adapted for use in the Extraordinary Form.

Jeff Ostrowski · December 1, 2023

My Response to Dr. Weaver’s Latest Article

Is it fair to forever bind Dom Guéranger to what he wrote about “barbarous archaisms” in 1855?

Jeff Ostrowski · November 4, 2023

PDF • Draft Booklet “Couture Chant” (255 Pages)

This is very much a “work in progress”…

Cynthia Ostrowski · September 11, 2023

Can a Lens Make a Difference?

My husband tells me this edition (by Dom Pothier’s student) is of monumental importance. I take him at his word.

Jeff Ostrowski · August 30, 2023

“Momentous Release!” • Freakishly Rare Gradual & Vesperal Published by Pothier’s Protégé (1,638 pages!)

He screamed into the telephone: “There’s no such thing as Gregorian Chant!”

Jeff Ostrowski · January 25, 2023

PDF Download • 1909 “Modern Notation” Gradual (Extremely Rare) — 712 Pages

The truth is stranger than fiction.

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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

“A striking detail: at Solesmes, we remember hearing Justine Ward criticize accompaniment sometimes or seeing her cover her ears, especially when the organ accompanied a soloist, which is something she could not accept.”

— Dom Pierre Combe

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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