Traces and comments upon the sources, history, and development of each of the rites and formularies of the book from the earliest known forms until the present day.
I do wish that Hatchett would have sourced more for certain statements and generalizations, but still found the book a great resource. Will continue to use it as a reference throughout my priesthood.
Great reference book. Some of the rubrics are kind of obscure but with the help of this book all is revealed. It also had gobs of informative detail on the BCP.