The exact origin and purpose of this manuscript is uncertain. It was begun in the 13th century, and added to in the 14th and 15th centuries. Most of its contents relate in some way to Ely Priory--many of them relating to a variety of private and public devotions--so it was presumably handed down from one Priory official to another. It appears to be a prayerbook, assembled for personal devotion. This initial 'S' introduces a prayer to the patron saint of a church. In the text the letter 'N' has been written ,and the person praying would insert the saint's name at these points. The red and blue 'puzzle' form (so-called because the pieces fit together like a jigsaw puzzle) is typical throughout England and France, but the colour-wash foliate ornament is particularly typical of manuscripts produced in Benedictine houses.