Tribulationes cordis*

After the Communion Domine deus meus, concluding the Saturday Mass Proper, a rubric reads Dominica vacat, referring to the Second Sunday of Lent. The following Reminiscere miserationum Proper preserves only incipits with notation. Chants written out of liturgical order, possibly due to a miscalculation of space. A second rubric, Aliud officium, introduces the traditional Aquitanian Mass Proper for the same Sunday, fully notated, beginning with the Introit Domine dilexi decorem.