Write a note on the use of Pastoral imagery in Blake’s “The Chimney Sweeper”.

Pastoral imagery is used in Blake's depiction of Heaven or freedom, the dreams of a young child and what being free truly meant. 

Were all of them lock'd up in coffins of black.

And by came an Angel who had a bright key,
And he open'd the coffins & set them all free;
Then down a green plain leaping, laughing, they run,
And wash in a river. and shine in the Sun.

Then naked & white, all their bags left behind,
They rise upon clouds and sport in the wind