What is the fine-grained topic of the following text: Katherine Briggs mentions the Shropshire ‘Will the Smith’ in her book, A Dictionary of Fairies: St Peter allowed a wicked blacksmith named Will a second chance to live a wholesome life on earth, but he lived it in such evil that he was doomed to wander the earth in purgatory. Only return the topic.
The story of 'Will the Smith' from Shropshire as mentioned in Katherine Briggs' A Dictionary of Fairies.