This is a signed letter from Friedrich Wilhelm Graf von Bülow Dennewitz (1755-1816). He was a very successful commander who led the Prussian IV. ArmeeKorps under Blücher at Waterloo. This ArmeeKorps faced the heaviest action and successfully carried out its mission during the momentous battle. The letter was written on 13 September 1813. and was a Dienstanweistung (instructions or regulations). For being nearly two-hundred-years-old, the letter is in surprisingly good condition.
Friedrich Wilhelm Freiherr von Bülow, Graf von Dennewitz (16 February 1755 – 25 February 1816) was a Prussian general of the Napoleonic Wars.SOURCE https://en.wikipedia.org/wiki/Friedrich_Wilhelm_Freiherr_von_B%C3%BClow