After visiting young cancer patients at a London hospital in September—including 9-year-old Fabian—the Duchess of Cambridge followed up with a personal letter to the boy, which was subsequently posted on his website. "Despite the enormously demanding course of treatment you are undergoing, I was so touched by your strength of character, and delighted to hear the news that one of your big sisters will be able to donate bone marrow to you later this year," she wrote.