To return to the structure of the _Fis_: at the end of the first twenty chapters, all that was necessary, in order to complete the design, was to bring Adamnán back into Paradise, and to dismiss him with the admonition to communicate what he had seen and heard, as in chapter 31, after which the peroration in chapter 32 naturally follows, and forms a fitting conclusion to the whole. However, it would seem that the redactor, following the example frequently set by mediæval compilers, who knew not how often the half is better than the whole, and were apt to look on perfection as consisting rather in the abundance of matter than in the due disposition of it, has attempted to supplement the design of the original author by the introduction of additional details which had long ere then become matters of common form in descriptions of the Otherworld. Even so, however, it must be admitted that he has managed his transitions with more than common skill. Although the wording of chapter 20 suggests that it was the intention of the original author to represent the fate of the lost in concise but impressive terms--a plan quite in keeping with the general tone of restraint which pervades the work--it might yet have been quite consistent with his design to insert the usual description of the various torments with which the different kinds of sinners are afflicted, and such a description would follow on quite naturally in the place where it actually occurs in the existing text. But the author of this part, whether the original author or a later editor, does not rest content with such a description; he introduces what amounts to a structural alteration of the work, and that in a style wholly inconsistent with the design of the earlier part. For in that part the road has been fully traced by which the departed spirits have already reached their final habitations; now, however, their pilgrimage is resumed anew, and the familiar bridge incident appears in chapter 21, where it discharges its usual double function of an approach to the Divine Presence, and of a sieve, or winnowing fan, as it were, for separating the wheat from the chaff. Wholly consistent as this is with mediæval eschatology, it is entirely inconsistent with the general plan of the present work, whereby that separation is effected by quite other means. Minor inconsistencies occur in the purgatorial nature of several of the punishments described in this second part, for we might expect that all requirements of the kind had been fulfilled during the soul’s progress through the seven so-called Heavens. These small inconsistencies, of themselves, would count for little, and might be regarded as faults of construction on the author’s part, or as the result of the imperfect development of the purgatorial theory, which leads to similar inconsistencies in other writings of this class, where a clear distinction is not often made between a normal process of