a season stoop to injurious blame

Alas! madam, they have already dared so far and incurred such peril by the lengths which they have gone, that they are but one step from the worst and uttermost.
Surely, said the Queen, her fears again predominating, Scottish nobles would not lend themselves to assassinate a helpless woman?
Bethink you, madam, he replied, what horrid spectacles have been seen in our day; and what act is so dark, that some Scottish hand has not been found to dare it? Lord Lindesay, besides his natural sullenness and hardness of temper, is the near kinsman of Henry Darnley, and Ruthven has his own deep and dangerous plans. The Council, besides, speak of proofs by writ and word, of a casket with letters — of I know not what.
Ah! good Melville, answered the Queen, were I as sure of the even-handed integrity of my judges, as of my own innocence — and yet ——
Oh! pause, madam, said Melville; even innocence must sometimes for a season stoop to injurious blame. Besides, you are here — He looked round, and paused.
Speak out, Melville, said the Queen, never one approached my person who wished to work me evil; and even this poor page, whom I have today seen for the first time in my life, I can trust safely with your communication.
Nay, madam, answered Melville, in such emergence, and he being the bearer of Lord Seyton’s message, I will venture to say, before him and these fair ladies, whose truth and fidelity I dispute not — I say I will venture to say, that there are other modes besides that of open trial, by which deposed sovereigns often die; and that, as Machiavel saith, there is but one step betwixt a king’s prison and his grave.
Oh I were it but swift and easy for the body, said the unfortunate Princess, were it but a safe and happy change for the soul, the woman lives not that would take the step so soon as I— But, alas! Melville, when we think of death, a thousand sins, which we have trod as worms beneath our feet, rise up against us as flaming serpents. Most injuriously do they accuse me of aiding Darnley’s death; yet, blessed Lady! I afforded too open occasion for the suspicion — I espoused Bothwell.
Think not of that now, madam, said Melville, think rather of the immediate mode of saving yourself and son. Comply with the present unreasonable demands, and trust that better times will shortly arrive.
Madam, said Roland Graeme, if it pleases you that I should do so, I will presently swim through the lake, if they refuse me other conveyance to the shore; I will go to the courts successively of England, France, and Spain, and will show you have subscribed these vile instruments from no stronger impulse than the fear of death, and I will do battle against them that say otherwise.