Illuminated manuscript pages, 15th century or 16th century

These manuscripts are from the Missale Romanum and contain pages 74 and 81. Page 74 gives the latter part of the Communion Prayer from the service for Tuesday in Holy Week, with the scriptures from Psalm 68: 13-14: "But as for me, my prayer is to Thee, O Lord; for the time of Thy good pleasure, O God, in the multitude of Thy mercy." On the following page, the service for Wednesday in Holy Week begins with the Introit from Philippians II: 10, 8 and 11: "In the name of Jesus let every knee bow, of those that are in heaven, on earth, and under the earth, for the Lord became obedient unto death, even to the death of the cross."; Page 81 begins with the final Communion Meditation for Ash Wednesday, Psalm 101:10,13-14: "Thou shall arise and have mercy on Zion, for the time has come to have mercy on it." At the bottom of the page begins the Introit for Maundy Thursday which is the celebration of the Holy Eucharist in commemoration of the Last Supper. On the last page the Maundy Thursday Introit begins with Galatians 6;14: "But it behooves us to glory in the cross of our Lord Jesus Christ: in Whom is our salvation, life and resurrection."