Felicity Gregson

 was a young woman who was supposed to meet with Madame Vastra in Ranskill Gardens, but due to Madame Vastra's double booking at the Greek Embassy, she sent her butler, Strax, instead. Before Strax had been able to meet with her, she was fatally injured and myteriously appeared inside a snowmen built by Harry and Jim. After the snowman melted around her, she died.