There was, in D. John's day, a very devout servant of God, called Fr. Juan de Calahorra, at Abrojo, who had known him as Jeromín in his youthful days, and had confessed him and often directed him in Valladolid and Villagarcia.
D. John much esteemed his holiness and gentle ways, and wished to keep the brother at his side as confessor and spiritual director during all the time he was in retreat, which was more than two months.
But during this time alarming news reached the solitude of the convent of Abrojo of the rebellion of the Moors of Granada, and Juan de Quiroga, who, like all those who knew him well, simply adored D. John and recognised his military qualities, which only needed scope in which to expand and triumph, advised him to beg the King to give him the command of the expedition.
D. John was fired with the idea, but first desired to consult Fr. Juan de Calahorra and Doña Magdalena de Ulloa, who came to see him several times during those two months. The brother much applauded the project, and as if moved by a spirit of prophecy, said to D. John that not only would he obtain the command, but that it would procure a great name for him throughout Europe.
As to Doña Magdalena, she equally approved of the idea, and insisted on its realisation with even more warmth than Juan de Quiroga or the brother; according to her, the indolent luxury of the Court was always harmful to D. John's youth, and only the responsibilities and hardships of war could keep the proper balance of his ardent nature.
And expressing herself more freely to Fr. Juan de Calahorra, the discreet lady said, "As only the King can marry him to a princess, let us meanwhile betroth him to war; masking her ugliness with the cosmetics of glory."
Satisfied by this, D. John posted to Madrid, and before presenting himself to his brother D. Philip, sent him the following letter:
"Y.C.R.M. The obligation I am under to Y.M., and my natural faith for and love for you, make me always tell you what seems to me suitable, with all submission. I informed Y.M. of my arrival in Madrid, and the reason why I came, and I thought that it was not necessary to worry Y.M. with papers of so little importance as mine. Now I have heard of the state of the rebellion of the Moors at Granada, and how hard pressed the city is, and the rumour is certainly true; as the vindication of Y.M.'s reputation, honour and greatness, lowered by the impudence of these rebels, is very near my heart, I cannot help breaking the obedience and submission I have always shown to the will of Y.M., by telling you my own and begging Y.M. (as it is the honour of kings to be constant in their favours and to make men by their hand), as I am Y.M.'s handiwork, to use me to apply your punishment, and you know that you can trust me more than others, and that no one can better inflict it on these rascals than I can. I confess that they are unworthy of much notice and that someone to punish them is all that is required; but as people, however vile, when they are strong become proud, and as they say that this is not wanting in the present case, it is necessary to deprive them of power: the Marqués de Mondejar is not strong enough for this (because they say that he disagrees with the President and that he is obeyed with a bad grace) and it is advisable to send someone who, like me, is naturally inclined to such work, and I am as obedient to the royal will of Y.M. as clay in the potter's hand, and it would seem to me a grave offence against my love, my inclination, and what I owe to Y.M. if I do not fulfil this duty; but well I know that those who serve Y.M. and are under your royal hand hold all securely and can ask for nothing further, but this is no reason why this action should be blamed, it should rather be esteemed. If I gain my wish, it will be sufficient reward. For this I came from Abrojo; which I should not have presumed to do without an express order from Y.M. except on such important service for Y.M. Our Lord keep the C. and R. person of Y.M.
"From the inn, the 30th of December, 1568. From Y.M.'s handiwork and most humble servant who kisses your royal hand.
"D. John of Austria."