I here follow Delbrück's "Gneisenau" (vol. ii., p. 194) and Charras (vol. i., p. 163). Reiche ("Mems.," vol ii., p. 193) says that his corps of 30,800 men lost 12,480 on the 15th and 16th: he notes that Blücher and Nostitz probably owed their escape to the plainness of their uniforms and headgear.
"Waterloo Letters," Nos. 163 and 169, prove that the time was 3 p.m. and not 3.30; see also Kincaid's account in Fitchett's "Wellington's Men" (p. 120).
"Waterloo Letters," No. 169.