The hymn Light's glittering morn is translated from the 9th C. office hymn, Aurora lucis rutilat ("Dawn's light glitters") found in the Frankish Murbacher Hymnen, a collection of 27 Carolingian-era hymns compiled at the Murbach Abbey, of which only one copy has survived. Because it is written in an Ambrosian meter, it is thought by some scholars to have antecedents though no earlier sources are known. The texts are in Latin with translations in Old High German formatted as interlinear glosses. The original eleven verses plus doxology have since been separated in the Roman Breviary into three separate hymns for use at Lauds, which is sung at daybreak; the current version is from John Mason Neale's translation, as found in the 2013 edition of Hymns Ancient and Modern, which compresses the original versification into a single, five-verse hymn. You can view the Murbach source at the Bodleaian Library website.

The tune was the setting for the Easter hymn, Lasst uns erfreuen herzlich sehr, which celebrates the resurrection narrative from the perspective of Mary. It first appeared in the Jesuit hymnal Ausserlesene Catholische Geistliche Kirchengesänge (Cologne, 1623, ed. Friedrich Spee), and the setting quickly produced variants regarding the distribution of the alleluias. German literature usually attributes authorship of both the text and the tune to the collection's editor. As a poet and hymnologist, the attribution to him of the text is plausible; however there are no first-hand references to support an assertion of musical composition. Moreover, the opening phrase can be found in a tune 100 years earlier attributed to Matthäus Greiter and adapted to GENEVAN 36 and 68, published in 1525. Authoritative English language sources are devoid of the attribution to an author. Originally rendered in common time, Ralph Vaughan Williams' harmonization rendered the music in the now more familiar 6/4 for the 1906 English Hymnal, which was set to Aethelstan Riley's Ye watchers and ye holy ones, based on the ancient hymns Te Deum and Axion Estin. In the WWI zeitgeist, the tune was re-named Vigiles et Sancti in many English hymnals, a convention that persisted for several decades in many English language hymnals.

Version 9.4.4

• Reconciled with other editions
• Score now US LTR landscape
• Voice leading refinements at the cadence (esp. Trumpets and Organ)
• Measure numbers properly account for split-measure anacruses

Current Version 9.5.1

• Revoiced (lowered) horn
• Re-assigned opening duet to trumpets
• Added alternate trumpet in C
• Retouched many details in the score and parts

Previous Versions

Version 9.3.3

• Score changed to 8-1/2 x 11 landscape (was 8-1/2 x 14 legal)
• Organ score (with choir part) 8-12 x 11 potrait single pages*
• Choir imposed for 8-page layout on 11x17 duplex printer -copier*
• Minor voice leading changes
• Added version for two trumpets (Dec 2025)

* the individual pages of both are identical, with optimized page turns

Version 9.2.2

• Shorter prologue (P2)
• Minor voice leading revisions
• Improved parts layout
• Vocal part prints duplex 11x17
  
  All creatures of our God and King also updated

Version 9.1.1

• Reissued with new score/part styles (legibility) 2021
• Revises cadence to lower penultimate note in descant
• Voice leading revisions brass instruments
• Correction to descant to remove a parallel
• Adds All Creatures of our God and King

8.10.2

• Revised and shortened the Prologue
• Other minor revisions to organ, brass parts
• Simplified parts sets

8.7.6

• Initial publication

Scans of Aurora lucis rutilat (Light's glittering morn) from 9th C Frankish Murbacher Hymnen - at the majuscule "A". The scribe is named as Reginbertus Augiensis c. 846 from the Benedectine abbey at Reichenau. The bishop of Reichenau, near Liechtenstein, was made abbot of Murbach Abbey in the Alsace, which is where this hymnal, the only known copy, was kept. It is Latin with interlinear glosses in Old High German. Bodleian Library, Oxford MS. Junius 25 folio 128v. and 129r.