‘The Almighty had not seen fit to give them the power,’ answered Knox.

‘Then you hold that subjects are entitled to take up arms against their sovereign,’ proceeded Mary. ‘In good faith, Master Knox, this is a dangerous doctrine even in these lawless times.’

‘Extreme means are allowable in extreme cases,’ was his reply; ‘the father hath authority over his family, but if the father be seized with madness, it is lawful for the children to rise up against him, and, stripping him of his power, to place him under constraint, for his safety and their own. So is it with princes, madam; and that prince who goeth about in his frenzy to commit iniquity, must be disarmed, deposed, and cast into prison until he hath been brought to a more sober mind, and disciplined to submission under the will of Heaven.’

It was a bold argument to propound in a royal palace in the presence of majesty itself. The Queen looked at her brother, astonished and aghast. True to his part, Moray assumed an air of profound reflection and conviction after mature thought. Again Mary felt goaded to irritation as she wondered how Elizabeth would have brooked a similar discussion, but she commanded herself with a strong effort, and shifted her ground for a new attack.

‘And where shall we find this will of Heaven declared,’ argued the Queen, ‘or who shall decide between you and me when each interprets differently the same command?’

‘The words of Scripture and the ordinances of the Church are sufficient for our guidance,’ replied the preacher.

‘But your Church is not mine’, retorted the Queen. ‘I believe in my heart the Church of Rome to be the true Church of God.’

‘Your will, madam,’ said the other, ‘cannot impose a reason, neither doth opinion constitute argument; I am fully prepared to bear witness against the Scarlet Woman whom ye would fain substitute for the pure Spouse: but I will employ the weapons of controversy, in which mine adversaries are so skilled, to do battle for the right. I will undertake to prove, against the strongest of your priestly disputants, that the Romish Church hath more degenerated from the truth and purity of apostolic teaching, than the Jews from the ordinances handed down to them by their first lawgivers—Moses and Aaron—when they shouted to the Roman governor that he should crucify the innocent, and let Barabbas go free.’

‘My conscience tells me it is not so,’ answered Mary. ‘I cannot contend with you in argument, as it is neither my profession nor my pleasure; but I have read and studied and formed my own conclusions. Why should not my views be as clear as yours, or may we not both be right?’

‘Impossible!’ thundered Knox. ‘Ye shall come out from the ungodly, and shall not be partakers with them—no, not of one single drop in the cup of their abominations. There is but one straight path for monarch and subject, the queen on her throne and the beggar at the gate. I tell you, madam, that if you deviate from it one hair’s-breadth, you shall be lost in the howling wilderness, and become the prey of the raging lion. I will not concede to you one jot nor one tittle; I will prove to you that your tenets are false, your practice sinful, and your ceremonials blasphemous. Stone by stone will I destroy the edifice that priestly ambition hath raised on the foundations of corruption, and cemented with the blood of the prophets from time to time, even unto this day. First of all, I will demolish the very keystone on which the whole fabric rests; I will cast down the idol and trample it under my feet; I will testify in the face of all men against the gross and godless mummery of the mass.’