This book is a very detailed investigation of the most important textual variant in the New Testament. Burgon proposes that Mark 16:9-20 is original, and that two quirks in the copying-process -- the insertion of an End-of-Lection note after 16:8, plus the accidental loss of the final page of a copy in which the absent page contained 16:9-20 -- are the source of the reading at 16:8 supported by Vaticanus and Sinaiticus. He reviews patristic testimony, especially the comments by Eusebius and Jerome, and analyzes the evidence from Vaticanus and Sinaiticus. The text includes some appendices which are useful even to those with no interest in the issue about Mark 16:9-20.