A Sea-Spell

HER lute hangs shadowed in the apple-tree,
While flashing fingers weave the sweet-strung spell
Between its chords; and as the wild notes swell,
The sea-bird for those branches leaves the sea.
But to what sound her listening ear stoops she?
What netherworld gulf-whispers doth she hear,
In answering echoes from what planisphere,
Along the wind, along the estuary?
She sinks into her spell: and when full soon
Her lips move and she soars into her song,
What creatures of the midmost main shall throng
In furrowed surf-clouds to the summoning rune;
Till he, the fated mariner, hears her cry,
And up her rock, bare-breasted, comes to die?