I know it's a long time since this thread was current, but it may be of interest to add that John McC actually recorded TWO songs, "The Foggy Dew"; the one to which reference is made here, "As down the hill I rode one morn..." in 1913, and earlier, I think 1908, the slow one beginning "A wan cloud was drawn o'er the dim, weeping dawn". Incidentally, I hear two lines rather differently from suggestions given here, tho it's true that both of these acoustic recordings suffer from surface hiss: the maiden's eyes were
"bright as the dew that weeps
On the Shannon's verdant side", and at the end she
"The sigh'd in mine arms
And all her charms
Were hidden... in the Foggy Dew"