By Voice of the Mirror Welcome back, SirThe last few months have been deeply worrying for the Royal Family. First the King and then the Princess of Wales revealed they had cancer. So the announcement that Charles will soon return to public duties will lift the spirits of his family and those of the wider nation. In the past, the royals kept their medical conditions from the public. The King and Kate broke with that tradition and, in doing so, gave encouragement to others living with cancer. In return, the good wishes of the public have helped sustain the King and the Princess throughout their …