Wallace Stevens: "Farewell to Florida (I)"

"Go on, high ship, since now, upon the shore,
The snake has left its skin upon the floor.
Key West sank downward under massive clouds
And silvers and greens spread over the sea. The moon
Is at the mast-head and the past is dead.
Her mind will never speak to me again.
I am free. High above the mast the moon
Rides clear of her mind and the waves make a refrain
Of this: that the snake has shed its skin upon
The floor. Go on through the darkness. The waves fly back."