I've done a bit of work on this family as a RAOGK volunteer. If you contact me through the RAOGK site I can pass it on to you. For example:
Frédéric ROCHE died Death 8 December 1882 in Rochefort
Death reported by: Amadée Rubin, 38, carpenter of Rochefort, brother-in-law of deceased; and Francois Surl – no relation.
Frédéric ROCHE died this morning at 6am in his house Rue Saint Paul no 32,
Aged 50, born in Sengonzac, Charente;
son of Jean Pierre Frédéric ROCHE
and Jeanne Garreau.