The CMAA is very pleased to present and host a beautiful pdf edition of Justine Ward's brilliant book on chant pedagogy from 1921: Music Fourth Year: Gregorian Chant According to the Principles of Dom Andre Mocquereau. The introduction is by Dom Mocquereau himself. The navigation links on the left side of the page expand to show the details of each chapter. The book also includes images that have been scanned at high resolution. The book concludes with chant exercises organized by mode.