The Spectral Horseman Percy Bysshe Shelley

What was the shriek that struck Fancy's ear
As it sate on the ruins of time that is past?
Hark! it floats on the fitful blast of the wind,
And breathes to the pale moon a funeral sigh.

It is the Benshie's moan on the storm,
Or a shivering fiend that thirsting for sin,
Seeks murder and guilt when virtue sleeps,
Winged with the power of some ruthless king,
And sweeps o'er the breast of the prostrate plain.

It was not a fiend from the regions of Hell
That poured its low moan on the stillness of night:
It was not a ghost of the guilty dead,
Nor a yelling vampire reeking with gore;

But aye at the close of seven years' end,
That voice is mixed with the swell of the storm,
And aye at the close of seven years' end,
A shapeless shadow that sleeps on the hill
Awakens and floats on the mist of the heath.

It is not the shade of a murdered man,
Who has rushed uncalled to the throne of his God,
And howls in the pause of the eddying storm.
This voice is low, cold, hollow, and chill,
'Tis not heard by the ear, but is felt in the soul.
'Tis more frightful far than the death-daemon's scream,
Or the laughter of fiends when they howl o'er the corpse
Of a man who has sold his soul to Hell.