Whilst Henry was engaged at Southampton in personally superintending the preparations for invading France, an event occurred well fitted to fill him equally with surprise, and indignation, and sorrow. A conspiracy against his crown and his life was brought to light, which had been formed by three in his company against whom he could have entertained no suspicions: Richard of York, whom he had created Earl of Cambridge; Henry Lord Scrope, the treasurer; and Sir Thomas Grey of Heton. The Rolls of Parliament, containing the authentic record (p. 133) of the proceedings consequent upon the discovery, and the original letters of the Earl of Cambridge, leave no question as to the designs of the conspirators. Some doubts may exist as to their motives: whether they were influenced singly by a generous resolution to restore the crown to its alleged rightful heir,[105] or by some less honourable and more selfish feeling;[106] whether by any offence taken against Henry, or, as it is alleged, by the vast bribe offered to them by the crown of France; or whether by more than one of these motives combined, must remain a matter of conjecture. We cannot, perhaps, be certified of the means by which Henry became acquainted with the plot, nor if, as we are told, he was informed of it by the Earl of March himself, can we ascertain beyond doubt how large or how small a share that nobleman had in the previous deliberations and resolutions of the conspirators. Whether he first consented to their design of (p. 134) setting him up as king, and then repented of so ungrateful an act towards one who had behaved to him with so much kindness and confidence, or whether he instantly took the resolve to nip this treason in the bud, no documents enable us to decide. If the Earl of Cambridge's confession be the truth, the Earl of March at one time was himself consenting to the plot. [Footnote 105: To suppose that this conspiracy could have originated, as it has been lately (Turner's History) suggested, in "the resisting spirit which Henry's religious persecutions occasioned, and which led some to wish for another sovereign," is altogether gratuitous, and contrary to fact. He was not carrying on religious persecution, and no resisting spirit on that ground had manifested itself at all.]