Какой здесь стихотворный размер?

The Raven croak'd as she sate at her meal,
And the Old Woman knew what he said,
And she grew pale at the Raven's tale,
And sicken'd and went to her bed.

Now fetch me my children, and fetch them with speed,
The Old Woman of Berkeley said,
The monk my son, and my daughter the nun
Bid them hasten or I shall be dead.

Заранее спасибо за ответы!