Elizabeth’s attitude to Philip underwent a marked change. Till then she had been unwilling to abandon the hope of a peaceful settlement. She had dealt him not a few stinging blows, but always with a certain restraint and forbearance, because they were meant for the purpose of bringing him to reason. Thirty years of patience on his part had led her to believe that he would never carry retaliation beyond assassination plots. At last, in his slow way, he had gathered up all his strength and essayed to crush her. Thenceforward she was a convert to Drake’s doctrine that attack was the surest way of defence. She had still good reasons for devolving this work as much as possible on the private enterprise of her subjects. The burden fell on those who asked nothing better than to be allowed to bear it. Thus arose that system, or rather practice, of leaving national work to be executed by private enterprise, which has had so much to do with the building up of the British Empire. Private gain has been the mainspring of action. National defence and aggrandisement have been almost incidental results. With Elizabeth herself national and private aims could not be dissevered. The nation and she had but one purse. She was cheaply defending England, and she shared in the plunder. The favourite cruising-ground of the English adventurers was off the Azores, where the Spanish treasure fleets always halted for fresh water and provisions, on their way to Europe. Some of these expeditions were on a large scale. But they were not so successful or profitable, in proportion to their size, as the smaller ventures of Drake and Hawkins earlier in the reign. The Spaniards were everywhere on the alert. The harbours of the New World, which formerly lay in careless security, were put into a state of defence. Treasure fleets made their voyages with more caution. “Not a grain of gold, silver, or pearl, but what must be got through the fire.” The day of great prizes was gone by.