Solution:"The Pied Piper of Hamelin" has the theme of 'agreements, once made, should be honored'. On one level, The Pied Piper is a simple, poetic morality tale, though many have viewed the work as a commentary on death, desire and the role of the artist in society.
"Two in the Campagna" refers to an area in the countryside around Rome. In this, Browning engages with themes of love, human limits and nature.