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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

Articles

Jeff Ostrowski · December 14, 2022

PDF Download • 1938 “White List of Sacred Music” (Archdiocese of Dubuque, Iowa) — 114 pages!

Their spelling of French names could have used some proofreading!

Jeff Ostrowski · December 13, 2022

Who Can Guess This Melody? • (Rorate Mass)

… from the “Roman Gradual” (1912) edited by Max Springer, a famous Gregorianist of the Beuron school.

Follow the Discussion on Facebook

Jeff Ostrowski · December 13, 2022

PDF Download • “Advent Eucharistic Hymn”

I don’t know a more powerful exposition on the Holy Eucharist than this striking hymn by Archbishop Pecham!

Matthew Frederes · December 12, 2022

Recent Book! • “The Politics of Plainchant”

Fascinating details from never-before-seen letters recently discovered in southern France!

Jeff Ostrowski · December 11, 2022

“Introit” (3rd Sunday of Advent) • Sung According the Church’s Official Rhythm

My humble attempt at singing the Introit for the 3rd Sunday of Advent in accordance with the official rhythm.

Jeff Ostrowski · December 10, 2022

PDF Download • “Kyriale Accompaniment Book” by Dr. Peter Wagner (138 pages)

… including a deliciously dazzling discovery you won’t want to miss!

Dr. Charles Weaver · December 8, 2022

Gregorian Rhythm Wars • “The Limits of History”

There’s nothing necessarily authentic about the “authentic” rhythm.

Jeff Ostrowski · December 8, 2022

“24 Sample Pages” • The Saint Isaac Jogues Illuminated Missal, Gradual, and Lectionary

During 2023, why not elevate your Ordinary Form parish’s liturgy with this illuminated pew lectionary?

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 6, 2022

Gregorian Rhythm Wars • “Jeff’s Second Response to Patrick” (6 Dec 2022)

You look upon these thousands of manuscripts in much the same way that I view the plainsong editions of Guillaume-Gabriel Nivers.

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.

Patrick Williams · November 30, 2022

Gregorian Rhythm Wars • “History Matters” (30 Nov 2022)

“It is important that these melodies should be performed in the manner that they were originally conceived as works of art.” —St. Pius X

Jeff Ostrowski · November 29, 2022

“Advent Hymn” • Composed by Flor Peeters

Peeters was organist at Malines Cathedral from 1923 until his death in 1986.

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Corpus Christi Watershed

President’s Corner

    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
    PDF Download • “Hymn for 2 Voices”
    Readers who click on this video will see that it starts with verses of the “Pange Lingua” hymn by Saint Thomas Aquinas (d. 1274) arranged for two voices. However, there’s a polyphonic refrain (“Tantum Ergo”) for three voices, taken from Kevin Allen’s Motecta Trium Vocum. If your choir is very small, this piece is for you! You can download the PDF score free of charge—and you can also utilize the rehearsal videos for each individual voice—by navigating yourself to #20323.
    —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

“Leave the Mass alone. Our churches are full—the Protestants, in spite of their vernacular, far otherwise.”

— Cardinal Godfrey (one of the Vatican II fathers)

Recent Posts

  • Dom Pothier • Photo from 1904
  • PDF Chart • “Plainsong Rhythm”
  • PDF • “3-Voice Motet” (Father De Laet)
  • PDF Download • “Hymn for 2 Voices”
  • (January 2026) • “Children Singing Plainsong”

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