Macdonald, meanwhile, was pursuing his retreat, and on the 27th repulsed Vlastov’s divisions, which had come up to support Kutuzov II, capturing some prisoners and a gun. But at Tilsit, on the 31st, he was deserted by Massenbach and was forced to fall back on Königsberg. He marched rapidly and steadily, and reached the Prussian capital in safety. On January 3rd, 1813, his rear-guard, under Bachelu, was driven through Labiau, after a hard fight, by Wittgenstein’s advance-guard under Chepelev. At Königsberg Macdonald was joined by Heudelet’s division, but Yorck’s defection ended all hope of being able to make a stand on the Pregel, and the retreat was continued to Danzig. When the blockade of Riga was raised, Paulucci sent Lewis with 8000 men to pursue Macdonald, and himself with 3000 made a dash for Memel, which he reached on December 15th, after an amazing march of 200 miles in 8 days. The place immediately surrendered. While Schwarzenberg had been contending with Sacken, General Kosinski with his Poles had once more invaded Volhynia, but was repulsed after a little skirmishing by Musin-Pushkin. Schwarzenberg, turning from his pursuit of Sacken, reached Slonim again on December 7th; but on learning of the catastrophe of the _Grande Armée_ he retreated on the 14th to Bielostok, arriving there on the 18th. Reynier drew back behind the Bug. On the advance of Sacken and Tuchkov, to assist whom Kutuzov also directed a column under Miloradovich, Schwarzenberg steadily withdrew, there being nothing but the most insignificant fighting. The Austrians eventually fell back into their own territory, while Reynier retreated towards Saxony. The Polish troops remained in the Vistula fortresses, and were mostly captured in the following year. The little field army which Poniatowski was able to collect was allowed to join Napoleon in Saxony, since its blockade employed too many troops.