MusicSack (archive) (fairly definitely this person; 1901 obituary said 84 years old, not 24.)
CERL (gives 1955 for death date- confusing much? Maybe his grandson also used the pseudonym Jean Varennes...)
BNF data - " Signe toujours J.-Ch., abusivement développé en Jean-Charles dans certains ouvrages de référence ; les actes de naissance et de décès donnent l'orthographe Jean-Chrisostome" - real name Jean-Chrisostome, miswritten as Jean-Charles in some reference works. Jean-Charles-Lucien Hess was probably someone _else_ (or J-Ch-Lucien = Jean-Chrisostome-Lucien Hess = 1816-1900...)