It was a picture of her late husband Hugh, and their two children Paul and Kelly, but in the background, staring out of one of the windows, appears to be some kind of apparition. Mrs Lamb said they had always been curious about the mysterious figure, but they never thought of having it examined, until they read about Prof Wiseman's study. "We saw the other photo in all the papers, and it was my daughter who remembered the one we had taken," said Mrs Lamb.