Meanwhile the Russians, finding their two wings united, to the number of 120,000, were not inclined to remain inactive. The French army at Witepsk lay considerably more dispersed than their own, and their plan was, by moving suddenly upon Napoleon, to surprise him ere his army could be concentrated. With this view, General Barclay directed the march of a great part of the grand army upon Rudneia, a place about half-way between Witepsk and Smolensk, being nearly the centre of the French line of position. Their march commenced on the 26th July; but on the next day, Barclay received information from the out-posts, which induced him to conclude that Napoleon was strengthening his left flank for the purpose of turning the Russian right wing, and assaulting the town of Smolensk in their rear. To prevent this misfortune, Barclay suspended his march in front, and began by a flank movement to extend his right wing, for the purpose of covering Smolensk. This error, for such it was, led to his advanced guard, who had not been informed of the change of plan, being placed in some danger at Inkowo, a place about two wersts from Rudneia. Platoff, however, had the advantage in the cavalry skirmish which took place. The Russian general, in consequence of the extension of his flank, discovered that there was no French force on the left, and consequently, that he was in no danger on that point; and he resumed his original plan of pressing the French at Rudneia. But while Barclay lost four days in these fruitless marches and countermarches, he at length learned, that the most speedy retreat towards Smolensk would be necessary to save him from that disaster which he had truly apprehended, though he mistook the quarter from which the danger was to come.