Analysis of The Evening Darkens Over

The evening darkens over
After a day so bright,
The windcapt waves discover
That wild will be the night.
There's sound of distant thunder.

The latest sea-birds hover
Along the cliff's sheer height;
As in the memory wander
Last flutterings of delight,
White wings lost on the white.

There's not a ship in sight;
And as the sun goes under,
Thick clouds conspire to cover
The moon that should rise yonder.
Thou art alone, fond lover.