The first document is indeed a rank list entry for one man:
"Comdt.: Gen. Lt. Gr. [= Commandant: Generalleutnant Graf] zu Rantzau".
A little Google-ing tells me that there was a Heinrich Adalbert Graf von Rantzau (27 Oct. 1834 - 11 June 1891) who was a Prussian Generalleutnant and the garrison commander of Koblenz and the Fortress of Ehrenbreitstein. This would appear to be him.
The second scan is apparently composed of excerpts from a list of abbreviations in the rank list, using only those that are relevant to the man in question.