That society did its own collecting in Wales and the article suggests that they didn't think too much of Mr Sharp!

A brief extract:

"There was a paternalistic slant to the English vision, according to which, folk song was a product of ‘unsophisticated humanity’ with the power to remedy ‘the sordid vulgarity of our great city-populations’ as Parry put it or, in Sharp’s terms, while it might be appreciated by ‘cultivated people’, it also had the merit of appealing to and educating ‘the uncritical’, and ‘will do incalculable good in civilizing the masses’. Sharp also saw folk song as a means of ‘stimulating the feeling of patriotism’, and by this he meant very specifically English patriotism. English education was, he said, ‘too cosmopolitan’ and bred ‘citizens of the world rather than Englishmen. And it is Englishmen, English citizens, that we want’.

Seen in this light, it is perhaps not surprising that the Welsh had certain reservations about Cecil Sharp. The working relationships of the folk song collectors of the four British nations were generally close and collaborative, as the mutual contributions to their various journals reveal, but Lloyd Williams thought Sharp proprietorial and domineering in his attitude to the study of folk song, and noted in his journal for 24 October 1909:

Mrs D [Mary Davies, then secretary of the Welsh Folk-Song Society and a noted singer] interviewed C. Sharp. (No one likes him – he is dictatorial and headlong.) Dictated to her – told her that if she wanted to know about Welsh ballads to go to Wynne Jones Carnarvon [!] His astonishment when Mrs D had gone to discover she was ‘the singer’. "