Just found this in Elemental Beings and Human Destinies - A lecture by Rudolf Steiner, Dornach, December 6, 1919

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THE ELF KING'S DAUGHTER

Sir Olaf rides from house and hall
Till late, his wedding guests to call.

There elves are dancing on the green,
Elf King's daughter amidst them is seen.

"Welcome Sir Olaf, your hand I'll take,
Come dance and join us for my sake."

"I shall not dance nor dance I may,
Tomorrow will be my wedding day!"

"Mark well, Sir Olaf, and dance with me —
Two golden spurs I'll give to thee!

A silken sark snow white and fine —
My mother bleached it by moonshine."

"I shall not dance nor dance I may
Tomorrow will be my wedding day!"

"Mark well, Sir Olaf, and dance with me —
A mountain of gold I'll give to thee!"

"To a mountain of gold I'll not say nay,
But I shall not dance nor dance I may."

"If you refuse to dance with me
Illness and pest shall follow thee."

Over his heart she struck amain,
Never he felt such bitter pain.

Pale-faced he sat on his horse so tame —
"Go back", she cried, "to your worthy dame."

And when at last he reached his gate
Trembling his mother stood to wait.

"My son, my son, oh tell me true
Why is your face of deathlike hue?"

"Of deathlike hue it needs must be
For Elf King's daughter did I see."

"My son so dear, and loved so well,
What to your bride I needs must tell?"

"Tell her that to the woods I'm bound —
To exercise my horse and hound."

At early dawn, at break of day,
Came bride and guests in their wedding array.

They feasted and drank of wine and beer —
"Where is Sir Olaf, my bridegroom dear?"

"Sir Olaf to the woods is bound
To exercise his horse and hound!"

The bride she lifted the cloth so red
There lay Sir Olaf — and he was dead.