The structural imperfections of the _Fis Adamnáin_ are enhanced by the appearance of composite design which the work bears in its present form, being apparently made up from two distinct versions, or else having been ‘perfected’ by some redactor by the addition of other matter. The latter explanation seems to us most probable. The first twenty chapters contain a complete and consistent account of the soul’s progress from death to judgment, followed by his relegation to the place which he has merited. It is this part of the work which displays that care for construction already noticed; a great part of the details, whether of native or foreign origin, which had come to be accepted as conventional features of the _Fis_ or sacred _Imram_, is here rejected, and the borrowings from the old romantic literature, though still abundant, are made duly subservient to the general design. This part, moreover, together with the peroration in chapter 32, bears testimony, by way of direct reference and otherwise, to the author’s possession of a greater erudition, and a wider culture, than were evinced by most of those who had treated of the same subject. Thus, apparently, we are entitled to conjecture that chapters 1-20, chapter 31 (probably), and chapter 32, may represent the work which originally purported, not, indeed, to have been written by Adamnán, but to contain the account of a vision seen and already related by him. If this hypothesis be correct, then the evidences of superior culture and erudition, apparent in this part of the work, and entirely consistent with what we know of Adamnán, increase the probability that it is founded upon some more or less accurate tradition of a vision actually related by him. For, to repeat what has been said on an earlier page, there is nothing but what is natural and probable in the tradition that Adamnán beheld, or composed for spiritual edification, a vision of the kind then so much in vogue, and took the occasion of a great concourse of the chief men of Ireland in order to promulgate it; while it is equally probable that a man of his culture and acquirements should have expended upon his task an originality and executive skill previously unknown, and altogether improbable that a work of one of the foremost and most famous men of his day, after being thus publicly made known, should have been left unrecorded save by the passing mention of a chronicler.