The Elements of Gaelic Grammar - Based on the Work of the Rev. Alexander Stewart, D.D #252476

But it was found that a considerable number Of Nouns remained, which though ending in a Consonant and having a Broad characteristic, were not declined in the Singular. This class must form a Fourth Declension or be included in the First. I have preferred the latter alternative as being the more simple way. Regarding this classification it is to be remarked that Nouns of the Second Declension are so peculiarly distinct from all others, that they must form a class by themselves. There can be no question regarding them.