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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

Jeff Ostrowski • Article Archive

A theorist, organist, and conductor, Jeff Ostrowski holds his B.M. in Music Theory from the University of Kansas (2004). He completed studies in Education and Musicology at the graduate level. Having worked as a church musician in Los Angeles for ten years, in 2024 he accepted a position as choirmaster for Saint Mary of the Immaculate Conception in Michigan, where he resides with his wife and children. —Read full biography (with photographs).

Jeff Ostrowski · January 20, 2020

Comparison • “1909 Missal vs. 1999 Missal”

A picture is truly worth 1,000 words!

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Jeff Ostrowski · January 20, 2020

Fr. Valentine Young, OFM — R.I.P.

Father Valentine Young, OFM—a faithful Catholic priest—died on 17 January 2020 around 8:00am.

Jeff Ostrowski · January 17, 2020

A quote from Fr. Valentine

Speaking of “nihil solliciti estis,” Fr. Valentine recently said: “I’ll bet that most people, including myself, have suffered more from things that never happened than from things that actually did happen.” Wise words!

Jeff Ostrowski · January 16, 2020

Circle is complete

This is interesting! We have made it all the way around the liturgical year for Vespers organ accompaniments—which means all we have to do now is fill in the “holes,” such as Candlemas.

Jeff Ostrowski · January 16, 2020

(2007) Fr. Valentine Young Speaks About Religious Habits In The 1960s

I desire to post more of these fascinating videos, as soon as I can find the time.

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Jeff Ostrowski · January 16, 2020

Fr. Valentine is very sick

I beg you to pray for Fr. Valentine Young, OFM, who I am told is dying (or may possibly have died already). He’s one of the most faithful & generous priests I know. There would be no CCWatershed without Fr. Valentine.

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Jeff Ostrowski · January 16, 2020

Website progress update

As of 15 January 2020, the website is still under construction. We have made progress, but there is still much to do. We thank James Doherty and Veronica Brandt for their generous assistance!

Jeff Ostrowski · January 15, 2020

What Palestrina Did With Kyrie II (“Fons Bonitatis”)

Many erroneously believe the Kyrie was the only thing troped, but that’s not even close to true.

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Jeff Ostrowski · January 14, 2020

A very serious issue

So few Catholics—even those who self-identify as “traditional” Catholics—give consideration to the sins of detraction, gossip, and libel. Some hide behind fake online identities and publish the most vile, dishonest material. Even though these hypocrites think they are “hidden,” God sees everything. By the way, never visit Twitter: it’s not a good place for one’s […]

Jeff Ostrowski · January 14, 2020

A Phenomenal Epiphany Hymn!

I wish Epiphany lasted forever—the hymns are rich with theology!

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Jeff Ostrowski · January 14, 2020

Chocolate as payment?

Church musicians realize we’re currently in tough times, but even the greatest artists did not have everything “exactly as they desired.” Vladimir Horowitz (one of the greatest pianists) was often paid for his concerts with CHOCOLATE instead of money. The Russian economy was awful, and nobody had money. But Horowitz didn’t want chocolate; he wanted […]

Jeff Ostrowski · January 7, 2020

JMO Copy (inviolable) St. Jean de Lalande Library of Rare Books

JMO Copy (inviolable) St. Jean de Lalande Library of Rare Books “The judicious searcher in this remarkable online collection will certainly reap great rewards for his effort.” — Fr. Robert A. Skeris, Benjamin T. Rome School of Music (CUA) HE SAINT Jean de Lalande Library is derived primarily from Jeff Ostrowski’s personal collection of rare […]

Jeff Ostrowski · December 31, 2019

Hymn • “A Solis Ortus Cardine” (In English)

The Church’s greatest hymn? Many believe it’s this one.

Jeff Ostrowski · December 30, 2019

PDF Accompaniment • “Jesu Redemptor Omnium”

You can compare my accompaniment to that of Achille P. Bragers.

Jeff Ostrowski · December 24, 2019

Video • “Hark! The Herald Angels Sing”

Older Catholic hymnals did funny things with this melody.

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Corpus Christi Watershed

President’s Corner

    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
    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
    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

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

“Is it not true that prohibiting or suspecting the extraordinary form can only be inspired by the demon who desires our suffocation and spiritual death?”

— The Vatican’s chief liturgist from 2014-2021, Interview with Edw. Pentin (23-Sep-2019)

Recent Posts

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  • Extreme Unction
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