In the authorised Miss Marple continuation short story The Open Mind, the Quaverley choir murders was a murder case solved by Miss Marple in collaboration with retired judge Sir Aaron Kahn. The story does not give us the details of the case except that it was a particularly difficult one which had baffled the police. The case was cracked when Miss Marple, who had been visiting her friend Ruth, a member of the choir, had pointed out the significance of a reversed oil painting. In order to celebrate their success in solving the case, Sir Aaron, an honorary fellow at St Bede's College, Oxford, had invited Miss Marple as his guest at a Founder's Dinner at the college. This had the result of placing Miss Marple in the middle of another murder which forms the main plot of the story.