“I took her dainty eyes, as well
As silken tendrils of her hair:
And so I made a Villanelle!”

Earnest Thayer Dowson, “Villanelle of His Lady’s Treasures” 

Most of Dowson’s works are lugubrious and tortured. This poem is a confection. What upsweep of spirit put him in such a happy compositional mood?