ill, and the letters written by Henry during his absence to his daughter-in-law are worded as if he were the most affectionate of fathers. On this progress the Prince of Wales accompanied his father for the first time, as the King had previously been loath to disturb his studies. "It is quite wonderful," wrote an observer, "how much the King loves the Prince. He has good reason to do so, for he deserves all his love." Already the crafty and politic King was indoctrinating his son in the system he had made his own: that the command of ready money, gained no matter how, meant power, and that to hold the balance between two greater rivals was to have them both at his bidding. And young Henry, though of different nature from his father, made good use of his lesson. Katharine's greatest trouble at this time (the autumn of 1504) was the bickering, and worse, of her Spanish household. We have already seen how Puebla had set them by the ears with his jealousy of his colleagues and his dodging diplomacy. Katharine appealed to Henry to bring her servants to order, but he refused to interfere, as they were not his subjects. Doña Elvira Manuel, the governess, was a great lady, and resented any interference with her domain.[11] There is no doubt that her rule, so far as regarded the Princess herself, was a wise one; but, as we shall see directly, she, Castilian that she was and sister of the famous diplomatist Juan Manuel, took up a position inimical to Ferdinand after Isabel's death, and innocently led Katharine into grave political trouble.