I have looked out
In the vast desolate night in search of him;
And when I saw gigantic shadows in
The umbrage of the walls of Eden, chequered
By the far-flashing of the cherubs' swords,
I watched for what I thought his coming: for
With fear rose longing in my heart to know
What 'twas which shook us all—but nothing came.

Cain (1821) act 1, sc. 1, l. 266