HE INTROIT for December 8th (Immaculate Conception of the Blessed Virgin Mary) is one of the longer Introits we find:
Here’s how it looks in modern notation, taken from a 1924 Solesmes book:
I much prefer the medieval “box notation,” because it shows the SHAPE of the melodies:
Here’s an audio file:
And here’s an organ accompaniment:
Visit Goupil Chant for all the rest of the Propers.