The Spanish admiral also showed great judgment and firmness in following the line of conduct that had been traced out for him; and on the 27th of July he brought his fleet unbroken, though sorely distressed, to anchor in Calais roads. But the King of Spain, had calculated ill the number and activity of the English and Dutch fleets; as the old historian expresses it, "It seemeth that the Duke of Parma and the Spaniards grounded upon a vain and presumptuous expectation, that all the ships of England and of the Low Countreys would at the first sight of the Spanish and Dunkerk navie have betaken themselves to flight, yeelding them sea-room, and endeavouring only to defend themselves, their havens, and sea-coasts from invasion. Wherefore their intent and purpose was, that the Duke of Parma, in his small and flat-bottomed ships should, as it were, under the shadow and wing of the Spanish fleet, convey over all his troupes, armour, and warlike provisions, and with their forces so united, should invade England; or, while the English fleet were busied in fight against the Spanish, should enter upon any part of the coast which he thought to be most convenient. Which invasion (as the captives afterwards confessed) the Duke of Parma thought first to have attempted by the river of Thames; upon the banks whereof, having at the first arrivall landed twenty or thirty thousand of his principall souldiers, he supposed that he might easily have wonne the citie of London; both because his small shippes should have followed and assisted his land-forces, and also for that the citie itselfe was but meanely fortified and easie to overcome, by reason of the citizens' delicacie and discontinuance from the warres, who, with continuall and constant labour, might be vanquished, if they yielded not at the first assault." [Hakluyt's Voyages, vol. i. 601.] But the English and Dutch found ships and mariners enough to keep the Armada itself in check, and at the same time to block up Parma's flotilla. The greater part of Seymour's squadron left its cruising ground off Dunkirk to join the English admiral off Calais; but the Dutch manned about five-and-thirty sail of good ships, with a strong force of soldiers on board, all well seasoned to the sea-service, and with these they blockaded the Flemish ports that were in Parma's power. Still it was resolved by the Spanish admiral and the prince to endeavour to effect a junction, which the English seamen were equally resolute to prevent: and bolder measures on our side now became necessary.