“My dear, there is an upper window in the prison, to which Charles can sometimes gain access at three in the afternoon. When he can get to it--which depends on many uncertainties and incidents--he might see you in the street, he thinks, if you stood in a certain place that I can show you. But you will not be able to see him, my poor child, and even if you could, it would be unsafe for you to make a sign of recognition.”