Here is a song collected from Mary Langsworthy in Stoke Fleming South Devon in 1892 by
Sabine Baring Gould. He went around the South West of England writing listening to ordinary people - mostly old - sing songs they had sung all their lives and that had been handed down from generation to generation. The
Baring Gould manuscripts
are in Plymouth Library. Back in the 1960's you could actually use the original manuscripts and this is one of the songs I collected and used myself. It was a well enough known song throughout England and could be found in various early 19th C. publications. The theme of the song seems to be that the inconstant lover is first likened to a Cuckoo that is a rover and lastly to a Sycamore which drops its leaves early.
The CuckooThe Cuckoo is a pretty bird she sings as she fliesHer bringeth good tidings her telleth no liesHer sucketh sweet floers to keep her voice clearAnd when she sings cuckoo the summer draweth near.O meeting is a pleasure but parting is griewfAn inconstant lover is worse than a thiefA thief can but rob me of all that I haveBut an inconstant lover wil send me to the grave.The grave will receive me and bring me to dustAn inconstant lover no maiden can trustThey'll court you and kiss you poor maids to deceiveThere's not one in twenty that one may beleiveCome all you fair maidens wherever you may beDon't hang your poor hearts on the Sycamore treeThe leaf it will wither the roots will decayAnd if I'm forsaken I persih away.Here is a scan of the melody with chords.