It has been nearly a whole generation since a Phoenix has been hatched. King Joshua has kept the egg close to him at all times. When he was a child he would keep it in his pocket. As he grew, the egg grew. When Joshua went to war for his kingdom, he left the egg behind. When he came home he found the egg to be the size of a human being.
That is when the maid finally told him the truth of the golden egg, of his mother the Phoenix, and of his father who was murdered, by his father. The poor boy had a lot of madness in his family to live down. He knew he could and would be a better king than his family before him. He would not mistreat his people.