That the force gathered there was enormous Drake well knew, but relying as much on the goodness of his cause as on the valour of his sailors, and upon the fact that the enemy would be too crowded together to fight with advantage, he would have carried out his plan had not a ship arrived from England with orders forbidding him to enter the Tagus. However, he lay for some time at the mouth of the river, destroying every ship that entered its mouth, and sending in a challenge to Santa Cruz to come out and fight. The Spanish admiral did not accept it, and Drake then sailed to Corunna, and there, as at Cadiz, destroyed all the ships collected in the harbour and then returned to England, having in the course of a few months inflicted an enormous amount of damage upon Spain, and having taken the first step to prove that England was the mistress of the sea. But while the little band of English had been defending Sluys against the army of the Duke of Parma, Philip had been continuing his preparations, filling up the void made by the destruction wrought by Drake, and preparing an Armada which he might well have considered to be invincible. Elizabeth was still continuing her negotiations. She was quite ready to abandon the Netherlands to Spain if she could but keep the towns she held there, but she could not bring herself to hand these over either to the Netherlands or to Spain. She urged the States to make peace, to which they replied that they did not wish for peace on such terms as Spain would alone grant; they could defend themselves for ten years longer if left alone; they did not ask for further help, and only wanted their towns restored to them. Had the Armada started as Philip intended in September, it would have found England entirely unprepared, for Elizabeth still obstinately refused to believe in danger, and the few ships that had been held in commission after Drake's return had been so long neglected that they could hardly keep the sea without repair; the rest lay unrigged in the Medway. But the delay gave England fresh time for preparation. Parma's army was lying in readiness for the invasion under canvas at Dunkirk, and their commander had received no information from Spain that the sailing of the Armada was delayed. The cold, wet, and exposure told terribly upon them, and of the 30,000 who were ready to embark in September not 18,000 were fit for service at the commencement of the year. The expenses of this army and of the Armada were so great that Philip was at last driven to give orders to the Armada to start. But fortune again favoured England. Had the fleet sailed as ordered on the 30th of January they would again have found the Channel undefended, for Elizabeth, in one of her fits of economy, had again dismantled half the fleet that had been got ready for sea, and sent the sailors to their homes.