[26] Perhaps the change from wood, #A#, to water, #B-F#, was made under the influence of some Merman ballad, or by admixture with such a ballad; e.g., 'Nøkkens Svig,' Grundtvig, No 39. In this (#A#) the nix entices a king's daughter away from a dance, sets her on his horse, and rides with her over the heath to a wild water, into which she sinks. It is also quite among possibilities that there was originally an English nix ballad, in which the king's daughter saved herself by some artifice, not, of course, such as is employed in #B-F#, but like that in #A#, or otherwise. Maid Heiemo, in Landstad, No 39, kills a nix with "one of her small knives." Had she put him to sleep with a charm, and killed him with _his own_ knife, as Lady Isabel does, there would have been nothing to shock credibility in the story. Aytoun, Ballads of Scotland, I, 219, 2d ed., hastily pronounces Buchan's ballad not authentic, "being made up of stanzas borrowed from versions of 'Burd Helen' ['Child Waters']." There are, indeed, three successive steps into the water in both ballads, but Aytoun should have bethought himself how natural and how common it is for a passage to slip from one ballad into another, when the circumstances of the story are the same; and in some such cases no one can say where the verses that are common originally belonged. Here, indeed, as Grundtvig remarks, IV, 7, note*, it may well be that the verses in question belonged originally to 'Burd Helen,' and were adopted (but in the processes of tradition) into 'The Water of Wearie's Well;' for it must be admitted that the transaction in the water is not a happy conception in the latter, since it shocks probability that the woman should be able to swim ashore, and the man not. [27] "This ballad appears modern, from a great many expressions, but yet I am certain that it is old: the present copy came from the housekeeper at Methven." Note by Sharpe, in Laing's ed. of the Ballad Book, 1880, p. 130, xvii. Motherwell, in his Minstrelsy, p. lxx, n. 24, says that he had seen a stall ballad as early as 1749, entitled 'The Western Tragedy,' which perfectly agreed with Sharpe's copy. But in his Note-Book, p. 5 (about 1826-7), Motherwell says, "The best copy of May Colean with which I have met occurs in a stall copy printed about thirty years ago [should we then read 1799 instead of 1749?], under the title of 'The Western Tragedy.' I have subsequently seen a posterior reprint of this stall copy under this title, 'The Historical Ballad of May Collean.' In Mr. Sharpe's Ballad Book, the same copy, wanting only one stanza, is given."