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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

Dr Peter Wagner Gregorian

Jeff Ostrowski · June 12, 2025

PDF Download • “Gospel Acclamation” for 29 June (Solemnity of Saints Peter and Paul, Apostles)

Jeff Ostrowski’s attempt to harmonize the most well-known of all Gregorian chants.

Jeff Ostrowski · April 7, 2024

Jeff Writes A Song About Dr. Weaver And Himself

This article—a “mini-dissertation” on syllabic plainsong—writes songs using the names of various CCW authors.

Jeff Ostrowski · May 2, 2023

Should Chant Be Accompanied On The Organ?

As late as 1924, Dom Mocquereau mentioned Dom Desrocquettes “whose beautiful and discreet accompaniments I hear every day at Solesmes.”

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Jeff Ostrowski · January 6, 2023

What Exactly Is Dr. Peter Wagner Talking About?

“These manuscripts had to be sought out in the public or capitular libraries, whose conservators were often hardly supportive of—if not outright hostile to—the reproduction of their treasures.”

Jeff Ostrowski · January 1, 2023

PDF Download • “Graduale Romanum” Organ Accompaniments by Dr. Peter Wagner (513 pages)

Dr. Peter Wagner, a famous musicologist, founded the “Gregorian Academy” in Freiburg (Switzerland).

Jeff Ostrowski · December 20, 2022

19 Dec. 2022 • “This One Has It All”

In case you missed it, this December 10th article about Dr. Peter Wagner, who founded the GREGORIAN ACADEMY at Fribourg (Switzerland), has it all: (1) A rare download [138 pages] of Dr. Wagner’s Kyriale Accompaniment Book; (2) Biographical information about Dr. Wagner; (3) A special surprise you’ll love; (4) Courtesy of Professor Weaver, a translation […]

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.

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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!

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 · 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!

Jeff Ostrowski · August 23, 2022

PDF Download • Organ Accompaniment for Kyrie VIII (“Missa de Angelis”) by Jeff Ostrowski

I consider this my best organ accompaniment … I hope you like it!

Jeff Ostrowski · August 8, 2022

PDF Download • “Salve Regina” (32 Versions)

In this article, I examine the elusive provenance of what some have called “the most popular piece of plainsong.”

Jeff Ostrowski · April 6, 2022

“Victimæ Paschali Laudes” • Nineteen (19) Organ Accompaniments

Including a remarkable musical setting by Father Adrian Fortescue (d. 1923).

Jeff Ostrowski · November 29, 2021

PDF Booklet • First Sunday of Advent Vespers (Organ Accompaniment) — Draft Copy

It may be an ugly booklet, but it got the job done yesterday.

Jeff Ostrowski · May 17, 2021

“Slanty Wampus” Doesn’t Count

From one of my composition teachers…

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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

“No living writer possesses a greater command over the English language than Msgr. Knox, but in this instance one cannot help feeling that he has allowed his virtuosity to get the better of him, and, in his anxiety to shield the holy of holies from vulgar intrusion, produced a text that would either pass over the listener’s head as completely as the original Latin, or else leave him groping so long after the meaning that he would be quite unable to keep pace with the officiating priest.”

— Dr. Herbert Patrick Reginald Finberg (University of Leicester)

Recent Posts

  • Fulton J. Sheen • “24-Hour Catechism”
  • Music List • (2nd Sunday of Lent)
  • PDF Download • “Funerals in the Ordinary Form”
  • Extreme Unction
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