"Away, let nought to love displeasing"

Is it known who was the author of the song to be found in Percy's *Reliques*, and many other collections, beginning— "Away, let nought to love displeasing." The first collection, so far as I know, in which it appears is entitled *Miscellaneous Poems by several Hands*, published by D. Lewis, London, 1726; and in this work it is called a translation from the ancient British. Does this mean a translation of an ancient poem, or a translation of a poem written in some extant dialect of the language anciently spoken in Britain? Either would appear to me incredible. As I feel much interested in the p…