Analysis of Orkney Lullaby

A moonbeam floateth from the skies,
Whispering, "Heigho, my dearie!
I would spin a web before your eyes,--
A beautiful web of silver light,
Wherein is many a wondrous sight
Of a radiant garden leagues away,
Where the softly tinkling lilies sway,
And the snow-white lambkins are at play,--
   Heigho, my dearie!"

A brownie stealeth from the vine
   Singing, "Heigho, my dearie!
And will you hear this song of mine,--
A song of the land of murk and mist
Where bideth the bud the dew hath kist?
Then let the moonbeam's web of light
Be spun before thee silvery white,
And I shall sing the livelong night,--
   Heigho, my dearie!"

The night wind speedeth from the sea,
   Murmuring, "Heigho, my dearie!
I bring a mariner's prayer for thee;
So let the moonbeam veil thine eyes,
And the brownie sing thee lullabies;
But I shall rock thee to and fro,
Kissing the brow he loveth so,
And the prayer shall guard thy bed, I trow,--
   Heigho, my dearie!"