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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

Christmas • “Approached By A Famous Musicologist”

Jeff Ostrowski · December 30, 2023

ISCONCERTING. Dr. Katharine Ellis—professor of musicology at Cambridge University in England—uses the word “disconcerting” to describe the argument I’ve been putting forth in terms of Dom Mocquereau’s illicit befouling of the Church’s official edition of Gregorian Chant. The way I’ve described matters is: Dom Mocquereau takes into account the complete plainsong repertoire when it comes to pitches, but only a handful of manuscripts when it comes to rhythm. I have described this minuscule portion of manuscripts—for which he has a predilection—as “MOC’S FANTASTIC FOUR.” In other words, I’ve pointed out how Dom Mocquereau, looking over the entire collection of ancient Gregorian manuscripts, unabashedly declared almost every single one of them to be ‘garbage’ from the standpoint of rhythm (although he valued those same manuscripts highly vis-à-vis the pitches).

Snazzy Words • Describing this phenomenon, Dr. Katharine Ellis uses fancier words on page 112 of her book (The Politics of Plainchant in fin-de-siècle France, 2013). If you’re somebody who likes grandiloquence, you will prefer her description to mine. But the argument she’s putting forth is very similar to mine:

The scientific drive for statistical proof that characterizes Mocquereau’s work on pitch contour is replaced, in his work on rhythm and interpretation, by extrapolation from a minute body of comparative evidence and the making of creative leaps in its analysis. Dom Mocquereau provides no equivalent, for rhythm, of the huge body of raw data used in the Paléographie musicale to demonstrate Gregorian melodic unity via Justus ut palma. He cannot. Instead he does the opposite: he elaborates an aesthetically based theory of interpretation which he presents—distilled via carefully selected examples—as both general and normative.

I warned you that Dr. Ellis uses snazzier words than I do!

Numerous Reasons • Some have claimed that I embrace the official edition “because it comes from authority.” I suppose that’s one reason, but there are many! For instance, it just makes sense to sing an edition the way it was intended to be sung by those who created it. Moreover, I believe the illicit elongations by Dom Mocquereau destroy the melodic line (often fatally) and tend to make plainsong fussy and plodding. Furthermore, having examined the ancient manuscripts for more than twenty years, I haven’t been able to find any evidence supporting the rhythmic claims of Dom Mocquereau—or, for that matter, his disciple, Dom Eugène Cardine.1

Does It Matter? • Does any of this matter? Readers must decide for themselves. I invite you to consider the first antiphon for CHRISTMAS VESPERS:

*  PDF Download • COMPARISON CHART
—Dom Mocquereau Vs. the Official Edition.

Looking at that chart, is there anything more to be said?

Famous Musicologist • A famous plainchant scholar approached me after one of our Christmas Masses last week. (This person is a university professor I’ve been following since the 1990s.) Coming forward, he shook my hand and said: “I want to thank you for supporting the official edition.”

1 I remain open to being convinced, if any readers are willing to point out such evidence.

Opinions by blog authors do not necessarily represent the views of Corpus Christi Watershed.

Filed Under: Articles, PDF Download Tagged With: Dom Eugène Cardine, Dr Katharine Ellis of Cambridge, Gregorian Rhythm Wars Last Updated: December 30, 2023

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About Jeff Ostrowski

Jeff Ostrowski holds his B.M. in Music Theory from the University of Kansas (2004). He resides with his wife and children in Michigan. —(Read full biography).

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President’s Corner

    💲 5.00 💵
    Our tiny 501(c)3 nonprofit organization exists solely by generous readers who donate $5.00 per month. We have no endowment; we have no major donors; we run no advertisements; we have no savings. A donor wrote to us: “I so appreciate all you do and have done, and your generosity is unprecedented. I am honored to be able to make a monthly contribution.” Another monthly donor says: “Thank you for everything CC Watershed does. We are able to add so much solemnity to Holy Mass due to the resources made available here.” Can you spare a few dollars each month to help us survive?
    —Corpus Christi Watershed
    Dom Pothier • Photo from 1904
    Dom Paul Cagin, in a 1904 publication (L’oeuvre de Solesmes dans la restauration du chant grégorien) made sure to include a beautiful image of Dom Pothier, the legendary abbot of St-Wandrille. Also shown is a very young Dom André Mocquereau. Auguste Pécoul—considered the spiritual “son” of Abbat Prosper Guéranger of Solesmes—wrote as follows on 24 June 1901: “To forestall any confusion, let us remember that there is just one Gregorian notation—that restored, according to the ancient manuscripts, by the eminent Abbot of Saint-Wandrille, Dom Pothier.” ✠
    —Jeff Ostrowski
    PDF • “3-Voice Motet” (Father De Laet)
    I believe 99% of our readers will recognize this hymn tune. Perhaps Father Edgard De Laet should have called it a ‘hymn’ instead of a ‘motet for three voices’—but he’s technically correct, since MOTET is defined as: “a short piece of sacred choral music, typically polyphonic and unaccompanied.” The even verses are for three voices, as you will see if you download the PDF score at #20245. The odd verses may be song a cappella SATB or unison with organ.
    —Jeff Ostrowski

Quick Thoughts

    “Reminder” — Month of Febr. (2026)
    On a daily basis, I speak to people who don’t realize we publish a free newsletter (although they’ve followed our blog for years). We have no endowment, no major donors, no savings, and refuse to run annoying ads. As a result, our mailing list is crucial to our survival. It couldn’t be easier to subscribe! Just scroll to the bottom of any blog article and enter your email address.
    —Jeff Ostrowski
    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

“The renewal also showed clearly that the formulas of the Roman Missal had to be revised and enriched. This was begun by Pope Pius XII in the restoration of the Easter Vigil and the Holy Week services, which formed the first stage in accommodating the Roman Missal to contemporary mentality.”

— Pope Paul VI (1974 Sacramentary)

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  • Dom Pothier • Photo from 1904

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Corpus Christi Watershed is a 501(c)3 public charity dedicated to exploring and embodying as our calling the relationship of religion, culture, and the arts. This non-profit organization employs the creative media in service of theology, the Church, and Christian culture for the enrichment and enjoyment of the public.