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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

PDF Download

Jeff Ostrowski · December 7, 2022

PDF Download • “Organ Accompaniment Booklet” • Vespers (3rd Sunday of Advent) — 23 pages

Were Pothier and Mocquereau homeless? The answer might surprise you.

Jeff Ostrowski · December 7, 2022

PDF Download • “Salve Regina” [Simplex] • An Elegant English Translation (2022)

The incomparable Andrew Hinkley kindly set it to plainchant notation.

Jeff Ostrowski · December 3, 2022

PDF Download • Organ Accompaniment Booklet: Vespers (2nd Sunday of Advent) — 27 pages

Dom Gajard said to Jean Langlais: “Hear the blackbird! It doesn’t know what an ‘ictus’ is, yet it sings better than we.”

Jeff Ostrowski · December 2, 2022

PDF Download • “Latin Christmas Carol” for SATB + Organ • By Gustaaf Nees (d. 1965)

I’m not embarrassed, because these practice videos save us time during rehearsals.

Jeff Ostrowski · November 25, 2022

PDF Download • Traditional Notation Gradual-Book (692 Pages) on Five Lines!

This book makes it easy for singers who only know Treble Clef.

Jeff Ostrowski · November 20, 2022

PDF Download • “How Does the Official Rhythm Actually Sound?”

Including three (3) professionally-scanned versions of the Kyriale, released here for the 1st time!

Jeff Ostrowski · November 16, 2022

PDF Download • Rare “Kyriale” Organ Accompaniment Book (175 pages)

Including a few brief responses to Professor Charles Weaver.

Jeff Ostrowski · November 13, 2022

PDF Download • “Gregorian Accompaniments” … Just in time for Advent! (366 pages)

The second half of today’s article answers questions submitted by Mr. Matthew Frederes.

Jeff Ostrowski · November 9, 2022

“Vatican Commission on Gregorian Chant” • Biographies for Its Twenty Members

Including two (2) documents translated into English for the first time!

Jeff Ostrowski · November 8, 2022

“Whoever controls the language controls the Masses.”

“Missa Back-To-The-Future” (a recent OCP offering) isn’t part of the treasury mandated by Vatican II; nor do I belong on the basketball court with Michael Jordan.

Corpus Christi Watershed · November 3, 2022

“Now Available!” • Campion Missal (3rd Edition)

Three words: “Sleek, Powerful, and Gorgeous”

Jeff Ostrowski · October 19, 2022

PDF Download • “Hymn List For Sundays” (until 8 December 2022)

As a child, Rex Harrison contracted measles, which took away the sight from his left eye for the rest of his life.

Jeff Ostrowski · October 15, 2022

USCCB • “Principal Music Books for the Eucharist”

The principal books of music for the Eucharist were recently (re-)confirmed by the United States Conference of Catholic Bishops.

Jeff Ostrowski · October 13, 2022

PDF Download • “Salve Regina” Chant in English (Four Different Versions)

I never knew these existed until earlier today!

Jeff Ostrowski · October 11, 2022

PDF Download • 1915 “Gregorian Vesperale” … Printed On Five Lines! (651 Pages)

Father Weinmann placed plainsong on five (5) lines, yet still used Gregorian notation—including chord symbols!

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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

    “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

“In the 17th century came the crushing blow which destroyed the beauty of all Breviary hymns. Pope Urban VIII (d. 1644) was a Humanist. In a fatal moment he saw that the hymns do not all conform to the rules of classical prosody.”

— Fr. Adrian Fortescue (d. 1923)

Recent Posts

  • “Reminder” — Month of Febr. (2026)
  • Seminary Music Directors Gather in Houston
  • 💲 5.00 💵
  • Dom Pothier • Photo from 1904
  • PDF Chart • “Plainsong Rhythm”

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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.