Royal watchers have begun to witness his decline, too. Though he will be stepping out on Easter Sunday for a service at Windsor, the king is missing from the royal calendar for the foreseeable future, instead relying heavily on his sister, Princess Anne, to do the work of the royal family. While many would have assumed his heir, Prince William, would be stepping up to the plate, he too is missing from the royal schedule due to Princess Kate Middleton’s own cancer diagnosis and treatment.