What is the rhyme scheme for Edgar Allan Poe's poem "A Dream"

ABAB

Explanation:

"A" rhymes with the next corresponding A

For Example

In visions of the dark night

I have dreamed of joy departed-

But a waking dream of life and light

Hath left me broken-hearted.

See how the second line rhymes with the fourth and how the first rhymes with the third.