Question: Who died first, Anton Edler Von Gapp or François Perrier (French Army Officer)?
Sentence (from "François Perrier (French Army officer)"): After some noteworthy publications on the trigonometrical junction of France and England( 1861) and on the triangulation and leveling of Corsica( 1865), he was put at the head of the Geodesic Service of the French Army in 1879.
Relevant evidence: No