I finished my reconstruction- then I looked at yours. I was missing your stanza 14:
"If you rise early in the morning, B2 And over lofty mountains wind, A4 Go straightway to yon brake of briars, A10 And in the ditch my body find." A10
A10 you give as JAF 46, but no US version has "brake of briars." JAF 46 has:
Go straight way to yon ditch of briars, There you find me dead and slain."
"brake" was substituted for "ditch" but the last line is different and not found in a book. Perhaps you changed "ditch" so you wouldn't have "ditch" twice. Just wondering where the last line came from?