Dr. Scrivener evidently prepared the Third Edition under great disadvantage. He had a parish of more than 5,500 inhabitants upon his hands, with the necessity of making provision for increase in the population. The result was that after adding 125 pages to his book he had an attack of paralysis, and so it is not surprising that his work was not wholly conducted upon the high level of his previous publications. The book has also laboured under another and greater disadvantage of too rapid, though unavoidable, growth. The 506 pages of the First Edition have been successively expanded into 626 pages in the Second, 751 in the Third, and 874 in the Fourth; while the framework originally adopted, consisting only of nine chapters, was manifestly inadequate to the mass of material ultimately gathered. It has therefore been found necessary, as the work proceeded, to do violence, amidst much delicate embarrassment, to feelings of loyalty to the author forbidding alteration. The chief changes that have been made are as follows:— The first intention of keeping the materials within the compass of one volume has been abandoned, and it has been divided into two volumes, with an increase of chapters in each. Instead of 2,094 manuscripts, as reckoned in the third edition under the six classes, no less than 3,791 have been recorded in this edition, being an increase of 236 beyond the 3,555 of Dr. Gregory, without counting the numerous vacant places which have been filled up. Most of the accounts of ancient versions have been rewritten by distinguished scholars, who are leaders in their several departments. The early part of Volume I has been enriched from the admirable book on “Greek and Latin Palaeography,” by Mr. E. Maunde Thompson, who with great kindness placed the proof-sheets at my disposal before publication. Changes have been made in the headlines, the indexes, and in the printing, and sometimes in the arrangement, which will, I trust, enable the reader to find his way more easily about the treatise. And many corrections suggested by eminent scholars have been introduced in different places all through the work.