Fo, fo, fo, for de Valera
In comes Mary at the door aye oh
Mary is the one who will have a bit of fun
And we don't want Annie any more aye oh.

Rope skipping song honoring de Valera, from Dublin.
Now who was this Mary and was having a "bit of fun" what it sounds like? Did rejected Annie take revenge? Maybe she was the one who started the story.