previous labours in the same field under widely different conditions, and even more for the light which they cast upon what is still one of the darkest places in the intellectual life of Europe. We have had occasion to remark before upon several particulars wherein the analogy between the _Fis Adamnáin_--and, to a less extent, others of the Irish Visions--and the _Commedia_ would appear to go deeper than can be explained by their common subject, and their use in common of the same general stock of ideas. However, it does not appear that the influence exercised by the Irish school mainly consisted in the introduction of novel ideas and incidents, though even these were not entirely absent. Indeed, throughout the history of the Vision legend, we may observe a continual tendency to drop any national or personal characteristics which it may have acquired at a previous stage of its evolution. For instance, we have seen to how great an extent the popular Christian eschatology was modelled upon the classical Elysium and Tartarus, yet even the earlier Church works upon the subject contain no such references to classical personages and traditions as were employed so copiously by Dante, and, in a slight and tentative manner, by certain of his predecessors. The same may be said of the Oriental myths which formed part of the Hebrew contributions to the subject. So, in proportion as the late mediæval visions of the Otherworld recede in date from those of the Irish school, they tend to drop more and more of the structure and imagery which were peculiarly characteristic of the latter, as owing great part of their form or colour to the Irish national traditions. This process is carried still further by Dante, who rejected many of the most familiar incidents of the earlier visions: _e.g._ the bridge, the open mouth of the dragon as symbolising Hell, Enoch and Elijah beside the Tree of Life, and the bird-flocks about them, the special provisions for various kinds of the half-righteous, etc. Thus, while exercising a secondary influence by further enriching the stock of material already in existence, the main function of the Irish Visions was to set a literary fashion, so to speak, whereby the Vision of the Otherworld came to be regarded as the most natural vehicle for conveying men’s thoughts and imaginations, as in other ages the epic, the drama, the dialogue, the pamphlet, the novel, and other forms of composition, have been specially affected for the like purpose.