"A dis, a dis, a green grass, A dis, a dis, a dis, Come all you pretty fair maids, And dance along with us." The singer goes a-roving, takes a girl by the hand, and promises her a prince. If the prince dies, she shall have another. All clap hands.
Roud lumps this with "Walking on the Green Grass," apparently on the basis that they're both playparties about green grass. They look distinct to me. - RBW