Note 517 — Chapter XIV · THE SEVENTEENTH OF JUNE: BLÜCHER AND WELLINGTON.
Reading edition
Ollech, p. 157. Maurice (pp. 354, 355: July, 1890) points out that this serves, as far as it goes, to show that Napoleon might have known of the retreat of Zieten and Pirch I. to Wavre without changing his opinion that the whole Prussian army was intending to fall back to the eastward.