An auction in aid of Children in Need has given music lovers a chance to own a piece of musical history. Renowned Catholic composer James MacMillan this week donated a section of an original manuscript to be auctioned online for the charity.  Written for the BBC Scottish Symphony Orchestra for the BBC Proms in 1990, The Confession of Isobel Gowdie is a tone poem based on the true story of a Scottish woman accused of witchcraft in the seventeenth century. The piece was one of the Scottish composer’s first to reach a wider audience. “I hope the auction winner will enjoy reading through this melodic line, an obsessive motif which emerges in the music as the mood darkens and the narrative becomes more threatening,” he said.The auction, which is due to end at midnight on