Little is left that testifies to the life of the Church of the East in the sixteenth to early nineteenth centuries. What we have, are manuscripts written by mostly clerical scribes for mostly clerical readers. There is much that suggests, however, that these texts functioned in a much wider circle than merely that of the learned. This study takes the scribal production of texts, from the Holy Scriptures to the first traces of popular writing, as its main source to analyze the major changes that took place in the Church of the East in the period. The most important of these was the introduction of Western Catholicism, which ultimately led to the creation of two separate hierarchies, today's Chaldean Church and the Assyrian Church of the East. How this community dealt with these monumental changes, how that affected everything from the production of texts to the fabric of society as a whole, and how that contributes to our understanding of this Church's modern day off-shoots, is the topic of this study.

The book contains evidence of the identity of the Nestorians, an account of their manners, customes and ceremonies, together with sketches of travel in ancient Assyria, Armenia, Media, and Mesopotamia, illustration of Scripture prophecy, and appendices.