The paramount importance of religious movements not only prevented a combination between France and England, but also brought both Catholic powers into closer agreement with one another, as soon as their immediate differences had been in some measure adjusted. Father Berulle had promoted the marriage of a French princess with the King of England in the hope of converting him; but now that he became conscious of his mistake, he lent his pen to a project for a common attack to be made by the Catholic powers upon England. The domestic dissensions in that country, which again aroused Catholic sympathies among a part of the population, appeared to favour such a project. An agreement on the subject was in treaty for some time. It was at last concluded and ratified in France in the form in which it was sent back from Spain.[465]

Although it is not clear that people in England had authentic information of these negotiations, yet the advances made by the two courts to one another, which were visible to every one, could not but cause some anxiety in the third. The English were always anxiously considering what Philip IV might have in view for the next year; at times even in Charles' reign they feared another attack from the Belgian coast. What would happen if France lent her aid in such an enterprise? It was known at all events that the priests exhorted her to do so. That France and Spain should make a joint attack on England appeared to be most for the interest of the Catholic world.[466]

Another ground for anxiety in England was from that resolution to revive the French naval power, which Richelieu had already taken in consequence of his late experiences. He bought ships of war, or had them built, and took foreign sailors into his service. Charles I perceived this with the greatest displeasure. He regarded it as a threat against England, for he thought that the French could have no other intention than that of robbing England of the supremacy that she had exercised from time immemorial over the sea which bears her name. He declared that he was resolved to prevent matters from going so far.

A great effect was produced by a very definite misunderstanding which now arose between England and France, and affected naval interests as well as the question of religion.

Of all the French Huguenots, who had been compelled by their last defeat to seek peace with the King, the citizens of Rochelle felt the blow most deeply. They had at that time been hemmed in on all sides, and were especially harassed by a fort erected in their neighbourhood. They had been assured that at the proper time they would be relieved of this annoyance. They had not an express and unequivocal promise; but the English ambassador, who had been invited to mediate, had guaranteed to them, after conference with the French ministry, such an interpretation of the expressions used as would secure the wished-for result.[467] But just the contrary took place: they were constantly being more closely shut in, and more seriously threatened with the loss of that measure of independence which they had hitherto enjoyed. They turned to Charles I. They would rather have acknowledged him as their sovereign than have submitted to such a loss, and he felt the full weight of his obligation to them. But, if he desired to grant them assistance, it could only be rendered by open war.

A.D. 1627. When the English resolved to undertake an expedition against the Island of Rhé, the prevention of the fall of Rochelle was not the only object in view. It was rather considered that nothing could be more desirable and advantageous than the command of this island in the event of a struggle with the two powers. For Biscay could be reached in a voyage of one night from thence, and the communication between the Netherlands and the harbours on the north-east coast of Spain could at any time be interrupted by the possessors of the island, which might be used at the same time for keeping up constant communication with the Huguenots, and for giving the French power employment at home.[468] The Huguenots had already taken up arms again, and Rochelle displayed the English banner on its walls. Charles I intended to use Rhé as a station for his fleet, but to cede the general sovereignty over it to Rochelle. A successful result here might serve to infuse new life into the Protestant cause.

In order to achieve so great an end the King thought it admissible to levy a forced loan, and thus to collect those sums which Parliament had promised him by word of mouth, but had not yet formally granted. We shall have hereafter to consider the resistance which he encountered in this attempt, and the various arbitrary acts to which he resorted for its suppression; for they formed one of the turning points of his history. At first he actually succeeded so far, that a fleet of more than a hundred sail was able to put to sea for the attack of Rhé and the support of Rochelle. It was considered in raising this loan that a war with France had greater claims upon popular support than any other. In the present doubtful state of affairs a decided advantage gained in such a war might even now have exercised great influence upon the internal state of the kingdom.

At this juncture Buckingham assumed a position of extraordinary importance. After the repeated failures of the Protestants, his undertaking aroused all their hopes. Directed against both the Catholic powers, it must, if successful, have directly benefited the French Protestants, and indirectly the German Protestants also by the effect which it would inevitably have produced. But it was besides one enterprise more undertaken by the sole power of the monarch: it was carried out independently of any Parliamentary grants properly so called. It represented the principle of a moderate monarchical Protestantism, combined with toleration for the native Catholics, among whom Buckingham endeavoured to find support. His was a position of which the occupant must either be a great man or perish. Buckingham, who had no equal in restless activity, and was by nature not devoid of adroitness and ability, nevertheless had not that persevering and comprehensive energy which is required for the performance of great actions. He had not gone through the school of those experiences in which minds ripen: and for the want of this training his native gifts were not sufficient to compensate. He was so far fortunate as to gain possession of the Island of Rhé; but Fort Martin, which had been erected there a short time before, and on which the possession of the island depended, defied his attacks, and he was not skilful enough to intercept the support which was thrown into the fort in the hour of its greatest danger. The defence of the French certainly showed greater perseverance than the attack of the English. Buckingham did not know how to awaken among his men that fiery devotion which shrinks from no obstacle, and which would have been necessary here. And the measures which were arranged at home were not so effective as to bring him at the right moment the reinforcement he needed. In November 1627 he returned to England without having effected his object. He left behind him the French Protestants, and Rochelle especially, in the greatest distress.

Charles I had no intention of proving false to the promises which he had given them, any more than he wished to allow the King of Denmark to sink under his difficulties. But what means did he possess of bestowing help either on the former or on the latter?

After the battle of Lutter he had told the Danish ambassador, that he would come to the assistance of his uncle, even if he should have to pawn his crown. How heavily his position weighed on him at that time! While he had undertaken the responsibility of contending for the greatest interests of the world, he was obliged to confess, and did so with tears in his eyes, that at present he hardly had at his disposal the means of defraying the necessary expenses of his daily life.