At length, seeing the absolute necessity of bringing the matter to an issue, Philip ordered the Spanish plenipotentiaries to write his final instructions to Feria, his minister in London. The envoy was authorized to say, that, although England had lost Calais through her own negligence, yet Philip would stand faithfully by her for the recovery of it. But, on the other hand, she must be prepared to support him with her whole strength by land and by sea, and that not for a single campaign, but for the war so long as it lasted. The government should ponder well whether the prize would be worth the cost. Feria must bring the matter home to the queen, and lead her, if possible, to the desired conclusion; but so that she might appear to come to it by her own suggestion rather than by his. The responsibility must be left with her.[266] The letter of the plenipotentiaries, which is a very long one, is a model in its way, and shows that, in some particulars, the science of diplomacy has gained little since the sixteenth century. Elizabeth needed no argument to make her weary of a war which hung like a dark cloud on the morning of her reign. Her disquietude had been increased by the fact of Scotland having become a party to the war; and hostilities, with little credit to that country, had broken out along the borders. Her own kingdom was in no condition to allow her to make the extraordinary efforts demanded by Philip. Yet it was plain if she did not make them, or consent to come into the treaty, she must be left to carry on the war by herself. Under these circumstances, the English government at last consented to an arrangement, which, if it did not save Calais, so far saved appearances that it might satisfy the nation. It was agreed that Calais should be restored at the end of eight years. If France failed to do this, she was to pay five hundred thousand crowns to England, whose claims to Calais would not, however, be affected by such a payment. Should either of the parties, or their subjects, during that period, do anything in contravention of this treaty, or in violation of the peace between the two countries, the offending party should forfeit all claim to the disputed territory.[267] It was not very probable that eight years would elapse without affording some plausible pretext to France, under such a provision, for keeping her hold on Calais. The treaty with England was signed on the second of April, 1559. On the day following was signed that between France and Spain. By the provisions of this treaty, the allies of Philip, Savoy, Mantua, Genoa, were reinstated in the possession of the territories of which they had been stripped in the first years of the war. Four or five places of importance in Savoy were alone reserved, to be held as guaranties by the French king, until his claim to the inheritance of that kingdom was determined.