For a right understanding of the point it is necessary to consider the character of the man who plays so important a part in this episode. Lord Monteagle, the eldest son of Lord Morley, ennobled under a title derived through his mother, was, in Mr. Jardine's opinion,[250] "a person precisely adapted for an instrument on such an occasion;" and the description appears even more applicable than was intended. He had been implicated in all the doings of the turbulent section of the English Catholics[251] for several years, having taken part in the rising of Essex, and in the Spanish negotiations, whatever they were, conducted through the instrumentality of Thomas Winter. With Catesby, and others of the conspirators, he was on terms of the closest and most intimate friendship, and Tresham was his brother-in-law. A letter of his to Catesby is still preserved, which, in the opinion of some, affords evidence of his having been actually engaged in the Powder Plot itself;[252] and Mr. Jardine, though dissenting from the view that the letter proves so much, judges it not at all impossible or improbable that he was in fact privy to the conspiracy. It is likewise certain that up to the last moment Monteagle was on familiar terms with the plotters, to whom, a few days before the final catastrophe, he imparted an important piece of information.[253] At the same time it is evident that Monteagle was in high favour at Court, as is sufficiently evidenced by the fact that he was appointed to be one of the commissioners for the prorogation of October 3rd, a most unusual distinction for one in his position, as also by the pains taken by the government on behalf of his brother, who had shortly before got himself into trouble in France.[254] A still more remarkable circumstance has been strangely overlooked by historians.[255] Monteagle always passed for a Catholic, turbulent indeed and prone to violence, but attached, even fanatically, to his creed, like his friend Catesby and the rest. There remains, however, an undated letter of his to the king,[256] in which he expresses his determination to become a Protestant; and while in fulsome language extolling his Majesty's zeal for his spiritual welfare, speaks with bitterness and contempt of the faith which, nevertheless, he continued to profess to the end of his life, and that without exciting suspicion of his deceit among the Catholics. Not only must this shake our confidence in the genuine nature of any transaction in which such a man played a prominent part, it must likewise suggest a doubt whether others may not in like manner have passed themselves off for what they were not, without arousing suspicion.