London - Last Monday, Prince Charles and Princes William and Harry sent flowers to Great Ormond Street Children's Hospital in central London in memory of Princess Diana. A large bouquet of white lilies arrived at the hospital. With the bouquet was a short message on a St James's Palace calling card, handwritten and signed by Ms Clair Southwell, an aide on Prince Charles's staff. It read: "The Prince of Wales, Prince William and Prince Harry have asked that these flowers be given to the Great Ormond Street Hospital for Sick Children."