That is simply outstanding. It's brilliant information. I take it "Eckert gen. von Roques-Maumont." means his last name was Eckert, but he was called (gennant) "Roques Maumont?"
He also served, as a young officer, with General Freiherr Theodor von Watter in Regiment 123, according to an account I have.
Von Watter during the time in question (1917) commanded 13th Army Corps.
Do you have anything on a Major of Pioniere von Stockmeier or a chief of staff for von Watter named Müller-Loebnitz, late 1917, 13th Army Corps?