‘Your Highness doubtless owes much to this man. But his object in helping you to the crown was that, although you wore it, he should rule through you.’

‘I know. Ambition is his great failing.’

‘Have a care, Highness. Watch this man. You should not share matters of great secrecy with him. Remember that he is wavering now. This time next week . . . perhaps tomorrow . . . he may be with your enemies.’

‘I will remember your words,’ Isabella assured him. ‘Now I pray you sit here with me and read these documents.’

The Cardinal did so, and watching him, Isabella thought: Have I gained the support of this man, only to lose that of one who served me so well in the past?

Impatiently, Alfonso Carillo, Archbishop of Toledo waited.

It was intolerable, he told himself that he should be kept waiting. It should be enough that the Queen knew he wished to see her for her to dismiss any other person that she might receive him.

‘Ingratitude!’ he murmured, as he paced up and down. ‘All that I have done in the past is forgotten. Since that young cockerel, Ferdinand, sought to show his power over me, he has poisoned her mind against me. And my place beside her has been taken by Mendoza.’

His eyes narrowed. He was a man of choleric temper whose personality would have been more suited to the military camp than to the Church. But as Archbishop of Toledo he was Primate of Spain; he was determined to cling to his position; and although he prided himself on having raised Isabella to the throne, if she failed to recognise that the most important person in Castile was not its Queen, nor her Consort, nor Cardinal Mendoza, but Alfonso Carillo, he, who had helped her to reach the throne, would be prepared to dash her from it.

His eyes were flashing; he was ready for battle.

And so he waited; and, when at length he was told that the Queen was ready to receive him, he met Cardinal Mendoza coming from her apartments.

They acknowledged each other coolly.

‘I have been waiting long,’ said the Archbishop reproachfully.

‘I crave your pardon, but I had state matters to discuss with the Queen.’

The Archbishop hurried on; it would be unseemly if two men of the Church indulged in violence; and he was feeling violent.

He went into the audience chamber.

Isabella’s smile was apologetic.

‘I regret,’ she said placatingly, ‘that you were forced to wait so long.’

‘I also regret,’ the Archbishop retorted curtly.

Isabella looked surprised, but the Archbishop considered himself especially privileged.

‘The waiting is over, my lord. I pray you let us come to business.’

‘It would seem that Your Highness prefers to discuss state matters with Cardinal Mendoza.’

‘I am fortunate in having so many brilliant advisers.’

‘Highness, I have come to tell you that I can no longer serve you while you retain the services of the Cardinal.’

‘I suggest, my lord, that you go too far.’

The Archbishop looked haughtily at this young woman. He could not help but see her as she had been when as a young Princess she asked for his help. He remembered how he had set up her young brother Alfonso as King of Castile while Henry IV still lived; he remembered how he had offered to make Isabella Queen on Alfonso’s death, and how she had gently reminded him that it was not possible for her to be Queen while the true King, her half-brother Henry, still lived.

Had she forgotten what she owed to him?

‘I pray,’ murmured the Archbishop, ‘that Your Highness will reconsider this matter.’

‘I should certainly not wish you to leave me,’ said Isabella.

‘It is for Your Highness to choose.’

‘But I choose that you should remain and curb your animosity towards the Cardinal. If you will be the Cardinal’s friend I am assured that he will be yours.’

‘Highness, it is long since I visited my estates at Alcala de Henares. I may shortly be asking your permission to retire there from Court for a while.’

Isabella smiled sweetly. She did not believe that the Archbishop would willingly go into retirement.

‘You are too important to us for that to be allowed,’ she told him; and he appeared to be placated.

But the Archbishop was far from satisfied. Every day he saw Cardinal Mendoza being taken more and more into his mistress’s confidence and, a few weeks after that interview with the Queen, he made an excuse to retire from Court.

He had, however, no intention of retiring to his estates. He had decided that, since Isabella refused to be his puppet, he must set up one in her place who would be.

He was well aware that there were certain men in Spain who were dissatisfied with the succession of Isabella and would be ready to give their allegiance to the young Princess Joanna La Beltraneja, who many preferred to believe was not illegitimate – for if she were the legitimate daughter of the late King, then she, not Isabella, should be Queen of Castile.

He called to his house certain men whom he knew to be ready to rebel. Among these was the Marquis of Villena, son of the great Marquis, the Archbishop’s nephew who, before his death, had played as big a part in his country’s politics as the Archbishop himself. The present Marquis might not be a brilliant intriguer like his father, but he was a great soldier, and as such thirsted for battle. He was very rich, this young Marquis, and because he owned vast estates in Toledo and Murcia he could raise support from these provinces.

There were also the Marquis of Cadiz and the Duke of Arevalo.

When these men were gathered together the Archbishop, making sure that they were not overheard, announced his plans to them.

‘Isabella has assumed the crowns of Castile and Leon,’ he said, ‘but there appears to be some doubt throughout this land as to whether she has a right to them. There are many who would rejoice to see the Princess Joanna in her place.’

There were murmurs of approval. None of these men had received great honours from Isabella and, if the young Princess Joanna were accepted as Queen of Castile, since she was only twelve years old, there would be a Regency and high places for many of them.

Eyes glittered, and hands curled about sword hilts. A Regency would be a very desirable state of affairs.

‘I strongly suspect these efforts to declare the Princess Joanna illegitimate,’ stated the Archbishop; and nobody reminded him that not very long ago he was one of the most fiery advocates of Joanna’s illegitimacy and Isabella’s right to the throne.

The circumstances had changed. Ferdinand had sought to curb his power; Isabella had transferred her interest to Cardinal Mendoza. Therefore the Archbishop had decided to change his mind.

‘My lord Archbishop,’ said Villena, ‘I pray you tell us what plans you have for dethroning Isabella and setting up Joanna in her place.’

‘There is only one way of bringing this about, my friend,’ replied the Archbishop, ‘and that is with the sword.’

‘It would be necessary to raise an army,’ suggested Arevalo. ‘Is that possible?’

‘It must be possible,’ said the Archbishop. ‘We cannot allow a usurper to retain the throne.’

He smiled at the assembly. ‘I know what you are thinking, my friends. Isabella has won the allegiance of many. Ferdinand is related to many Castilian families. It might be difficult to raise an army, you are thinking. Yet we will do it. And I have other plans. They concern the Princess Joanna. Do not forget that young lady has her part to play in our schemes.’

‘I cannot see the young Princess riding into battle,’ said Villena.

‘You take me too literally, my dear Marquis,’ answered the Archbishop. ‘You cannot believe that I would have brought you here unless I had something to put before you. The Princess will be the bait we have to offer. Then I think we can draw powerful forces into the field. I propose to dispatch an embassy immediately. My friends, let us put our heads close together and lower our voices, for even here there may be spies. I will now acquaint you with my plans. They concern Portugal.’