A conspiracy equally unsuccessful but more famous, because discovered at the time, was that of Anthony Babington. Burghley's excellent secret service apprised the government not only of the principals but also of aid and support given to them by Philip II and Mary Queen of Scots. Parliament petitioned for the execution of Mary. Though there was no doubt of her guilt, Elizabeth hesitated to give the dangerous example of sending a crowned head to the block. {339} With habitual indirection she did her best to get Mary's jailer, Sir Amyas Paulet, to put her to death without a warrant. Failing in this, she finally signed the warrant, [Sidenote: Mary beheaded, February 8, 1587] but when her council acted upon it in secret haste lest she should change her mind, she flew into a rage and, to prove her innocence, heavily fined and imprisoned one of the privy council whom she selected as scapegoat. [Sidenote: War with Spain] The war with Spain is sometimes regarded as the inevitable consequence of the religious opposition of the chief Catholic and the chief Protestant power. But probably the war would never have gone beyond the stage of privateering and plots to assassinate in which it remained inchoate for so long, had it not been for the Netherlands. The corner-stone of English policy has been to keep friendly, or weak, the power controlling the mouths of the Rhine and the Scheldt. The war of liberation in the Netherlands had a twofold effect; in the first place it damaged England's best customer, and secondly, Spanish "frightfulness" shocked the English conscience. For a long time the policy of the queen herself was as cynically selfish as it could possibly be. She not only watched complacently the butcheries of Alva, but she plotted and counterplotted, now offering aid to the Prince of Orange, now betraying his cause in a way that may have been sport to her but was death to the men she played with. Her aim, as far as she had a consistent one, was to allow Spain and the Netherlands to exhaust each other. Not only far nobler but, as it proved in the end, far wiser, was the action of the Puritan party that poured money and recruits into the cause of their oppressed fellow-Calvinists. But an equally great service to them, or at any rate a greater amount of damage to Spain, was done by the hardy buccaneers, Hawkins and Drake, who preyed upon the Spanish treasure {340} galleons and pillaged the Spanish settlements in the New World. These men and their fellows not only cut the sinews of Spain's power but likewise built the fleet. [Sidenote: England's sea power]