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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

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Jeff Ostrowski · November 19, 2020

PDF Download • Several Useful Plainsong Books

“Variae Preces” (1892) — “Cantus Varii” (1902) — “Cantus Varii” (1928) — “Cantus Selecti” (1957)

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Andrea Leal · October 29, 2020

PDF Download • Rare 1970 Document Explains “Spoken vs. Sung Propers”

This is perhaps the single most significant liturgical document CCWatershed has ever unearthed—and translated to English! • Explains the origin of “Gradual Antiphons” vs. “Missal Antiphons” (a.k.a. “Sacramentary Antiphons”)+

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Jeff Ostrowski · October 28, 2020

PDF Download • Beautiful Requiem Mass Image

“Every diocese, almost every church, had its own customs. Our present rule dates from the revived missal of 1570.”

Jeff Ostrowski · October 23, 2020

PDF Download • Extremely Simple (Yet Gorgeous) Polyphonic Funeral Mass

These rehearsal videos were recorded by one person, and he apologizes for the poor singing quality…

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Corpus Christi Watershed · October 22, 2020

PDF Download • “Mass Propers for Weekdays, Commons, and Saints” (1,294 pages)

Useful links as a “follow-up” to Mæstro Clark’s article about Fr. Weber’s plainsong settings.

Jeff Ostrowski · October 13, 2020

PDF Download • “Taste and see the goodness of the Lord” (Responsorial Psalm)

Including a written tutorial on how to perform Chabanel Psalms correctly.

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Jeff Ostrowski · October 8, 2020

PDF Download • Communion Antiphon (Mt 16:24) with Organ Accompaniment

To give you an idea how this sounds, I recorded the piece on my toy organ.

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Jeff Ostrowski · September 29, 2020

PDF Download • Extremely Rare! — 1966 “Book of Catholic Worship” (809 pages)

Do you recognize where these pages were stolen from in 1966, when they hoped nobody would notice?

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Jeff Ostrowski · September 10, 2020

PDF Download • 1928 “Invitatory” (86 pages)

The “invitatory” occurs at the beginning of Matins and therefore introduces the daily divine Office.

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Jeff Ostrowski · September 1, 2020

PDF Download • “Communion Antiphon” (with organ accompaniment)

An exciting new project gives me great hope for the “musical future” of the Catholic Church!

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Jeff Ostrowski · August 9, 2020

PDF Download • “Veni Creator Spiritus” Organ Accompaniment (Each Verse Notated)

Accompaniment to the hymn “Veni Creator Spiritus” with all the verses written out (composed by Jeff Ostrowski).

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Corpus Christi Watershed · August 8, 2020

PDF Download (2,092 pages) • “Liturgical Notes on the Roman Missal” by Archbishop Schuster

Blessed Alfredo Ildefonso Cardinal Schuster was a Benedictine monk who became the Archbishop of Milan.

Jeff Ostrowski · July 31, 2020

“Stella Caeli Exstirpavit” • Gregorian Chant During Times Of Pestilence

I would give anything to know how these girls created this recording—because it’s free rhythm!

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Jeff Ostrowski · July 23, 2020

PDF Download • “Holy Week and Easter with Gregorian Chant” (797 pages)

Supremely rare Belgian book with Gregorian Chant!

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Jeff Ostrowski · July 14, 2020

PDF Download • “Saint Edmund Arrowsmith Mass”

The fourth installment—“Mass settings that work well, even with a single cantor + organist.”

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Corpus Christi Watershed

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

    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
    “Reminder” — Month of January (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. Signing up couldn’t be easier: simply scroll to the bottom of any blog article and enter your email address.
    —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

“I am now old but I was young when I was received into the Church. I was not at all attracted by the splendour of her great ceremonies—which the Protestants could well counterfeit. Of the extraneous attractions of the Church which most drew me was the spectacle of the priest and his server at Low Mass, stumping up to the altar without a glance to discover how many or how few he had in his congregation; a craftsman and his apprentice; a man with a job which he alone was qualified to do.”

— Evelyn Waugh (7 August 1964)

Recent Posts

  • 💲 5.00 💵
  • Dom Pothier • Photo from 1904
  • PDF Chart • “Plainsong Rhythm”
  • PDF • “3-Voice Motet” (Father De Laet)
  • PDF Download • “Hymn for 2 Voices”

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