@leeneia: The daughter is dead long before the lover returns. Possibly a ghost, more likely a hallucination caused by fond remembrance and the morning sun, but I doubt it was her soul taking leave of her body, since she would have been long buried elsewhere. Otherwise, one would have to question the sanity and sanitation of the father—and the necrophilia of the lover.

The chapbook version (ca. 1800) is titled "The Ploughman's Love to the Farmer's Daughter", which is a major reworking of a long blackletter broadside from a century before "The Unnatural Mother: or, The two Loyal Lovers Fatal Overthrow" (1693). I'm sure the Bodley has the former, and I believe I also found the latter there.

As Noreen said, Help: Flandyke Shore is a far more informative thread.