Abstract
The scope and importance of the present work is manifest even to a casual glance; the actual heights of scholarly penetration and disinterestedness to which it rises can only be appreciated by the detailed examination of its text. From this latter examination, it readily appears that we are confronted with no ad hoc construction, no work cut, so to say, to fit a present need, however valid and cogent; but a work reflecting a near lifetime of application and animated by a relentless devotion to documentary truth. For this reason, any account of it must, in simple justice, begin with a brief historical notice of the work itself.