A good friend of mine, Terry Whelan from Manchester used to sing a version of this that his two sons had picked up in the school playground - perhaps in the 1970s. I may have some imperfections of memory - sorry Terry!
There was a lady dressed in green Fare a lair a lido There was a lady dressed in green Down by the greenwood side-o.
She had a baby 3 months old
She had a penknife long and sharp
She stuck it in the baby's heart
She went to the well to wash it off
There came a rat-tat at the door
In came three bobbies rushing in ( bobbies = policemen)