The martial spirit of volunteer sailors, and the keen instinct of mercantile speculation, were relied upon--exactly as in England-- to furnish men, ships, and money, for these daring and profitable adventures. The foundation of a still more intimate connection between England and Holland was laid, and thenceforth Dutchmen and Englishmen fought side by side, on land and sea, wherever a blow was to be struck in the cause of human freedom against despotic Spain. The famous Babington conspiracy, discovered by Walsingham's "travail and cost," had come to convince the Queen and her counsellors--if further proof were not superfluous--that her throne and life were both incompatible with Philip's deep designs, and that to keep that monarch out of the Netherlands, was as vital to her as to keep him out of England. "She is forced by this discovery to countenance the cause by all outward means she may," said Walsingham, "for it appeareth unto her most plain, that unless she had entered into the action, she had been utterly undone, and that if she do not prosecute the same she cannot continue." The Secretary had sent Leicester information at an early day of the great secret, begging his friend to "make the letter a heretic after be had read the same," and expressing the opinion that "the matter, if well handled, would break the neck of all dangerous practices during her Majesty's reign." The tragedy of Mary Stuart--a sad but inevitable portion of the vast drama in which the emancipation of England and Holland, and, through them, of half Christendom, was accomplished--approached its catastrophe; and Leicester could not restrain his anxiety for her immediate execution. He reminded Walsingham that the great seal had been put upon a warrant for her execution for a less crime seventeen years before, on the occasion of the Northumberland and Westmorland rebellion. "For who can warrant these villains from her," he said, "if that person live, or shall live any time? God forbid! And be you all stout and resolute in this speedy execution, or be condemned of all the world for ever. It is most. certain, if you will have your Majesty safe, it must be done, for justice doth crave it beside policy." His own personal safety was deeply compromised. "Your Lordship and I," wrote Burghley, "were very great motes in the traitors' eyes; for your Lordship there and I here should first, about one time, have been killed. Of your Lordship they thought rather of poisoning than slaying. After us two gone, they purposed her Majesty's death."