The Duke of Wellington had been, as had Marshal Blücher, aware for the last few days of the movement of large masses of French troops near the frontier, but he had not deemed it necessary or desirable in any way to alter his dispositions. He felt that his army was the force relied upon to protect Brussels, where the King of the Netherlands was, and Ghent, where the King of France was, and that it was of the utmost importance that Napoleon should not be allowed to gain the political advantage of putting those newly made sovereigns to flight,[146] and repossessing himself of Belgium and Holland. Moreover, of the importance of preserving his own communications with Antwerp and Ostend the Duke was well aware. He believed that Napoleon’s best move would be against his communications;[147] and he felt that, under this belief, he ought to hesitate before concentrating his army and moving it by its left to gain a union with that of Marshal Blücher.[148] Hence he retained his own headquarters at Brussels, thirty-four miles[149] from Charleroi. His army, as has been already stated, lay in cantonments to the westward of the Charleroi-Brussels turnpike. It is well known that Wellington looked for a movement of the French either on the road from Mons to Brussels or to the westward of that road. He had repaired the fortifications of Mons, Ypres, Tournay and other places, and put them in a state of defence.[150] It is also to be observed that for the last three days before the opening of hostilities the information that came to him of the enemy’s movements indicated a probable concentration of their forces near Mons.[151] Wellington’s troops, if they remained in the positions which they occupied on June 12th, for instance, could be concentrated at Braine-le-Comte or Hal,—towns on the road from Mons to Brussels,—much more readily than at Quatre Bras or Gosselies,—that is, they were well situated to oppose such a movement of the French as that which the Duke thought it most likely Napoleon would make. They were, it is true, still in their cantonments, scattered about in the towns and villages, but the Duke evidently thought that he would have time enough to assemble his various detachments and concentrate his army after the movements of his adversary should have been clearly ascertained. For holding this opinion he has been sharply criticised, but this we will consider in another place.