Who was Baa Baa Black sheep's second bag of wool for?

3 bags if wool; the second bag was for the Dame (the aristocracy).

This is the poem with the answers in bold:

baa baa black sheep,

have you any wool?

yes sir, yes sir,

3 bags full!

one for the master (the king)

one for the dame (the aristocracy)

and one for the little boy who lives down the lane (the producer)

Thank you said the master,

thank you said the dame,

and thank you said the little boy who live down the lane!