Somewhere between 10 and 11 A.M. he reached Sart-à-Walhain. Thence he proceeded to Walhain, or, as it is sometimes called, Walhain St. Paul.[590] He alighted at the house of a M. Hollert, the notary of the neighboring village of Nil St. Vincent, who lived in a large house in Walhain known as the Chateau Marette. Here he stopped to write a despatch to the Emperor and to get his breakfast. The cavalry of Exelmans and the 3d Corps under Vandamme had passed this point on the road to Wavre, and had reached or perhaps passed Nil St. Vincent. The despatch, which is dated Sart-à-Walhain, by an error for Walhain,—11 A.M.,—begins by stating that the Ist, IId and IIId Corps of Blücher’s army are marching in the direction of Brussels. Grouchy subsequently says:—[591] “This evening I expect to be concentrated at Wavre, and thus to find myself between Wellington, whom I presume to be in retreat before your majesty, and the Prussian army.” He also states that some of the Prussians are proceeding towards the plain of the Chyse, near the Louvain road, with the design of concentrating there, or of fighting any troops which may pursue them there, or of uniting themselves to Wellington. This part of the despatch looks as if Grouchy thought that a part of the Prussians intended to concentrate to his right. Still, as he distinctly states that the Ist, IId and IIId Corps are marching in the direction of Brussels, we must suppose that he is not referring to these three corps when he speaks of those Prussians who are proceeding towards the plain of the Chyse. So that, when he says that at Wavre he expects to be between Wellington, who he supposes is retiring on Brussels by the Charleroi turnpike, and the Prussian army, three of whose corps are, he says, also retiring on Brussels, it is difficult, if not impossible, to know what he means. He seems to have been completely bewildered.