The Parliament of England had in good faith proposed their scheme of confederacy against their common enemies both by sea and land, but the States-General made so many objections and delays that the term fixed for the negotiation expired, and the English ambassadors took their leave in disgust. The battle of Worcester awoke the Dutch to their mistake, and they then sent in haste to propose terms of alliance on their part, but it was too late. St. John, strong in his feelings as he was deep in his intellect, had represented their conduct in such terms that the English Parliament received them with a cool haughtiness the counterpart of their own in the late attempt at treaty. St. John had also employed himself in a measure of revenge on the Dutch which was in its effects most disastrous to them. Owing to the embarrassments of the other European States, the Dutch had grown not only to be the chief merchants of the nations, but the great carriers of all mercantile goods. Parliament passed a Navigation Act, by which it was forbidden to introduce any of the products of Asia, Africa, or America into England, except in English vessels, or any of the manufactures of Europe, except in English ships or the ships of the countries which produced them. This at one blow lopped off the greater part of the commerce of Holland, and the demands of the ambassador that this terrible Act should be repealed, or at least suspended till the conclusion of a treaty, were totally disregarded. But this was not the only offensive weapon which St. John's resentment had found. Letters of marque had been issued against French vessels, and they were permitted to be used against Dutch ones, on pretence that they had French property on board. Still more, the massacre of the English at Amboyna, which had been lightly passed over, owing to the desire of the English Court to maintain the alliance of Holland against Spain, had never been forgotten by the English people, and there were now loud demands, especially from the sailors, that all survivors of the Dutch concerned in that murder should be given up. In fact, a determined spirit of hostility had sprung up between the two maritime nations. The Dutch, at the call of their merchants for protection, prepared a fleet, and placed at the head of it the three greatest admirals that their nation ever produced--Van Tromp, De Ruyter, and De Witt. The English Parliament, on their part, ordered their admirals to insist on the same homage being paid to their flag in the narrow seas as had been paid to that of the king. They also demanded indemnification for the losses sustained in the East Indies from the Dutch, and insisted on the stipulated contribution of the tenth herring from the Dutch fishermen in the British seas.