On the other hand, there can be no doubt that the Ulidian portions of Muirchu depend on a Ulidian or Down tradition. This has been set forth fully and lucidly by Dr. Gwynn. I think, however, that it must remain an open question whether Muirchu, as Dr. Gwynn is disposed to believe, visited Down and collected information on the spot. The local colouring might have been taken from a written source. In any case he used a written source (also used by Tírechán) for the Slemish episode. * * * * * For a full running analysis of Muirchu’s work I may refer to Dr. Gwynn’s _Introduction_ (chaps, ii. and iii.); but I must indicate the remarkable construction of Book II., which he was the first to explain. The theme with which it opens is Patrick’s diligence in prayer (sect. 1), which is illustrated (sect. 2) by the story of the dead man and the cross, which leads to another story (sect. 3) told on the authority of the auriga of Patrick. Then the narrative passes to the circumstances connected with Patrick’s death and burial; after which there is a final section in which the author (with the words _Iterum recurrat oratio_) recurs to the initial subject, _De diligentia orationis_.[309] The sections which recount the saint’s death and burial form a separate unity within the framework, and there is external evidence which Dr. Gwynn has with great probability interpreted as showing that this narrative was a distinct document which Muirchu incorporated. The evidence consists in two numerals (ui and uiii) which occur in the MS. (fol. 8, rᵒ b), and must be explained as two of an original series of numbers which occurred in the exemplar which the scribe Ferdomnach had before him. These numbers could not have represented the numbers of the sections of the whole Book (as given in the Table of Contents), but they correspond exactly to the sections of the narrative of the death and burial. This will be best shown by a tabular arrangement. Sections of Book II. De Patr. delig. orationis 1 De mortuo ad se loquente 2 De inluminata dom. nocte, etc. 3 Sections of incorporated document.