Seasonal Psalm for Lent Be merciful, O Lord, for we have sinned. Psalm 51. Antiphon: P. Craig. Verses: RP, 90. 1 manuscript by Proulx of fourth verse and antiphon for chorus. 1 copy of manuscript of whole psalm setting. Plainsong verses and two part harmony antiphon by Proulx. 1 copy of score: published antiphon and Gelineau psalm tone. Hymnal Number: 1070 in Worship III.