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Corpus Christi Watershed

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Views from the Choir Loft

Pothier De Caetero 1906

Jeff Ostrowski · October 22, 2025

PDF Download • “Marian Antiphon Booklet” (4 pages) + Five Rhythmic Considerations

This 4-page ‘insert’ contains the seasonal Marian antiphons and various settings of the “Kýrie” my parish will be learning.

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Jeff Ostrowski · April 2, 2024

“Response to Dr. Weaver” • 2 April 2024

Catholic musicians must avoid being viewed as “esoteric freaks” who can’t agree on anything and spend their entire lives fighting about things nobody cares about.

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Jeff Ostrowski · November 21, 2023

Jeff Ostrowski’s Performance of Plainsong Attacked as “Inartistic”

The special Vigil of Christmas “Alleluia” sung according to the official rhythm of the Catholic Church.

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Jeff Ostrowski · July 19, 2023

Gregorian Rhythm Wars • “Jeff’s Fourth Response to Patrick” (19 July 2023)

Twenty years ago, I had the opportunity to conduct a week-long interview with Dom Cardine’s former boss.

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Dr. Charles Weaver · November 13, 2022

Gregorian Rhythm Wars • “Charlie’s First Response to Jeff” (13 Nov 2022)

Ostrowski, wishing to avoid fussiness, may justifiably refuse this invitation. But to argue, as he has, that these signs and the prayerful and aesthetic movements they embody are “illicit” is just wildly off the mark.

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Jeff Ostrowski · November 1, 2022

“Gregorian Chant Rhythm Wars” • Ostrowski Vs. Williams

My colleague, Patrick Williams has agreed to enter into a “colloquy” with me vis-à-vis Gregorian rhythm.

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Jeff Ostrowski · July 22, 2022

PDF Download • Professionally-Scanned “Graduale Romanum” (Schwann, 1908) • 1,129 pages!

This is the “pure” Vatican Edition—technically the only version of the rhythm allowed by Church documents!

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Corpus Christi Watershed · July 6, 2022

“Chant Rhythm Wars” • Dueling Lectures!

Ostrowski Vs. Weaver: Solesmes Rhythm, Gregorian Semiology, Dom Mocquereau, Dom Pothier, Mensuralism, and more!

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Jeff Ostrowski · May 17, 2021

“Slanty Wampus” Doesn’t Count

From one of my composition teachers…

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Jeff Ostrowski · February 23, 2021

“Old Solesmes” Method • What’s That?

I recently conducted an experiment…with surprising results.

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Jeff Ostrowski · January 28, 2020

Pothier’s 1906 “De Caetero” Letter • 3 Translations

“The Catholic tradition cannot be that of any special school, either ancient or modern…” —Abbot Pothier

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Jeff Ostrowski · February 22, 2017

“Morae Vocis” acc. to the Vatican Edition

The «Kyriale» contains very few melismatic morae.

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Jeff Ostrowski · October 7, 2015

Sloppy 1953 Schwann

The “white notes” (as Dr. Joseph Lennards called them) are quite sloppy, which really took me by surprise.

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Jeff Ostrowski · December 4, 2013

1934 “Antiphonale Monasticum” (Solesmes Abbey) • Free PDF Download!

Feel free to download all 1,296 pages!

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Corpus Christi Watershed

President’s Corner

    Knox. Has. No. Equal.
    Dr. Finberg (of the University of Leicester) famously said: “No living writer possesses a greater command over the English language than Monsignor Ronald Knox.” A lifetime spent among his works would not exhaust them; always another thing to see, never once a reason to look away. Consider the marvelous way Knox Englished the famous VERBUM SUPERNUM of Saint Thomas Aquinas. The 4th verse (in Latin) means: “By being born, He became man’s companion; at this supper, He became man’s food; in dying, He became man’s ransom; in reigning, He is man’s reward.” Knox brilliantly makes the English fit the Latin meter: The manger, Christ their equal made, | That upper room, their souls’ repast, | The Cross, their ransom dearly paid, | And heav’n, their high reward at last. I believe the meaning of the French word “manger” was not absent from his thoughts when he penned that stanza.
    —Jeff Ostrowski
    Proportionalist Plainchant • (Documented)
    On this website, we believe: “If we don’t know where we came from, we can’t know where we’re going.” As a result, we often spend hours scanning old books of GREGORIAN CHANT (and organ accompaniments). We don’t claim those items are useful or desirable for today’s circumstances; the goal is understanding where we came from. Here is a fascinating musical score from the 19th century. At that time, it was believed that MENSURALISM (a.k.a. “proportionalism”) was the historically correct way to sing plainsong.
    —Jeff Ostrowski
    Garnier Alleluias • “Have They Moved?”

    We received an email asking whether the “Garnier Gospel Acclamations website” has…

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    —Jeff Ostrowski

Quick Thoughts

    “Predictable Rhymes?” • A Follow Up
    We received considerable correspondence regarding my article, Two Ways to Defile a Hymn. More specifically, what really raised certain people’s hackles was its follow-up article dealing with the keyboard accompaniment for the CHRIST THE KING HYMNAL. But to quote Eliza Doolittle: “Have I said anything I oughtn’t?” Please examine this PDF file and see whether you agree. Were the editors of the BRÉBEUF HYMNAL incorrect to insist upon sophisticated and clever rhymes, rather than mind-numbingly predictable rhymes?
    —Jeff Ostrowski
    ‘Ould’ But Not Good
    Dom Samuel Gregory Ould (note the spelling) was a Benedictine monk at FORT AUGUSTUS ABBEY in Scotland. As musician, organist, and composer, Dom Ould was highly regarded. Moreover, he was considered an authority on Gregorian Chant. But not everything found in an old book—or, in this case, an “Ould” book—is necessarily praiseworthy. Consider this page from Dom Ould’s hymnal. Do you see the rhymes? They offend severely by ABR (“Abuse By Reuse”) and are utterly predictable. In my recent article—Two Ways to Defile a Hymn—I addressed this topic.
    —Jeff Ostrowski
    “Reader Feedback” • 22 June 2026
    A reader wrote to us from Virginia: “I really appreciate the 23 harmonizations that you posted on CORPUS CHRISTI WATERSHED for the Daily, Daily, Sing to Mary hymn. I hope to find willing voices in our small Schola Cantorum to try the three-voice version. Carry on, sir! You’re doing the Lord’s work.” While we don’t know this gentleman personally, we note that he earned a Ph.D. (which demonstrates that our blog has something for everybody). 😊
    —Corpus Christi Watershed

Random Quote

The eminent theologian Suarez (who died in 1617) […] took the position that a pope would be schismatic “if he, as is his duty, would not be in full communion with the body of the Church as, for example, if he were to excommunicate the entire Church, or if he were to change all the liturgical rites of the Church that have been upheld by apostolic tradition.”

— Monsignor Klaus Gamber (1981)

Recent Posts

  • “Panis Angelicus” • Organ Accompaniment (7 Pages)
  • 1,187 Pages • “Dripping With Color, Craft, and Splendor” (Missale Romanum, 1933)
  • Knox. Has. No. Equal.
  • “Plainsong Propers” • Fascinating 1980s Recordings
  • Proportionalist Plainchant • (Documented)

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