"Minor works" trivia

[Estelyn Telcontar]

This thread is inspired by the "minor works" quote thread on the Quotes forum. The list of works used there is:

Farmer Giles of Ham
The Adventures of Tom Bombadil
Leaf by Niggle
Smith of Wootton Major
On Fairy Stories
Mythopoeia
The Homecoming of Beorhtnoth Beorhthelm's Son
Sir Gawain and the Green Knight
Father Christmas Letters
The Monsters and the Critics
Roverandom
The Lay of Aotrou and Itroun
A Secret Vice

For the beginning, it might be wise to stick to the first four of them; after we warm up, we can spread out and get more complicated!

Here's the first question: Whose daughters danced the Springle-ring?