Napoleon's instructions to Grouchy on the morning of 17 June 1815

Pursue the Prussians, complete their defeat by attacking them as soon as you come up with them, and never let them out of your sight. I am going to unite the remainder of this portion of the Army with Marshal Ney's Corps, to march against the English, and to fight them if they should hold their ground between this and the Forest of Soignies. You will communicate with me by the paved road which leads to Quatre Bras.