I belive this is part of a letter of a German soldier to his sister. He was killed by the unit and mentioned in the diary.
Extract of a letter from German volunteer Konrad Malek, written to his sister, hours before he was killed by British. Dated Nov.1, 1915
Looked into this soldier's unit; turns out Konrad Malek was from the Upper Silesia region in Germany, now part of Poland.