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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 · January 19, 2021

PDF Download • “Mass Propers For Sundays And Holydays Set To Simple Melodies” (429 pages)

In 1947, this book was given a double “Imprimatur” by Cardinal Spellman, Archbishop of New York.

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Jeff Ostrowski · January 5, 2021

PDF Download • “Essential Liturgical Chart”

I’ve never spent as much time creating a Liturgical Chart as I did for this one.

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Jeff Ostrowski · January 5, 2021

PDF Download • “Blessing of Epiphany Water”

An 18-page PDF for the Solemn Blessing of Water on the Eve of the Epiphany.

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Jeff Ostrowski · January 3, 2021

PDF Download • “Puer Natus In Bethlehem” — Simple Christmas Hymn (2 Pages)

This is one of my favorite Gregorian hymns; very catchy!

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Jeff Ostrowski · January 2, 2021

PDF Download • “No woman shall kiss her child on the Sabbath or fasting day.”

The “Blue Laws” were a series of fanatical laws enacted by the Puritans of the colony of Connecticut…

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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Corpus Christi Watershed

President’s Corner

    Which Mass?
    In 1905, when the Vatican Commission on Gregorian Chant began publishing the EDITIO VATICANA—still the Church’s official edition— they assigned different Masses to different types of feasts. However, they were careful to add a note (which began with the words “Qualislibet cantus hujus Ordinarii…”) making clear “chants from one Mass may be used together with those from others.” Sadly, I sometimes worked for TLM priests who weren’t fluent in Latin. As a result, they stubbornly insisted Mass settings were ‘assigned’ to different feasts and seasons (which is false). To understand the great variety, one should examine the 1904 KYRIALE of Dr. Peter Wagner. One should also look through Dom Mocquereau’s Liber Usualis (1904), in which the Masses are all mixed up. For instance, Gloria II in his book ended up being moved to the ‘ad libitum’ appendix in the EDITIO VATICANA.
    —Jeff Ostrowski
    Like! Like! Like!
    You won’t believe who recently gave us a “like” on the Corpus Christi Watershed FACEBOOK PAGE. Click here (PDF) to see who it was. We were not only sincerely honored, we were utterly flabbergasted. This was truly a resounding endorsement and unmistakable stamp of approval.
    —Jeff Ostrowski
    PDF Download • “Atténde Dómine”
    Although it isn’t nearly as ancient as other hymns in the plainsong repertoire, Atténde Dómine, et miserére, quía peccávimus tíbi (“Look down, O Lord, and have mercy, for we have sinned against Thee”) has become one of the most popular hymns for LENT—perhaps because it was included in the famous Liber Usualis of Solesmes. This musical score (PDF file) has an incredibly accurate version in English, as well as a nice version in Spanish, and also the original Latin. Although I don’t claim to have a great singing voice, this morning I recorded this rehearsal video.
    —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

Yet, with all its advantages, the new Missal was published as if it were a work put together by professors, not a phase in a continual growth process. Such a thing never happened before. It is absolutely contrary to the laws of liturgical growth, and it has resulted in the nonsensical notion that Trent and Pius V had “produced” a Missal four hundred years ago.

— Josef Cardinal Ratzinger (1986)

Recent Posts

  • PDF Download • “Funerals in the Ordinary Form”
  • Extreme Unction
  • Which Mass?
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  • PDF Download • “Pange Lingua” in Simple (Contemporary) Polyphony for Three Voices

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