Brent gave some incorrect information under 'Souvenir de Christophe Cochet' in THE OLD ROSE ADVENTURER. Christophe Cochet was the GRANDFATHER of Scipion Cochet and Pierre-Philemon FILS.
Christophe Cochet 1777-1819 Pierre-Philemon, his son 1796-1853 Pierre-Philemon fils 1823-1899 Scipion Cochet, brother of Pierre-Philemon fils 1833-1896 That makes Christophe the grandfather of Scipion and Pierre-Philemon FILS That shows Brent Dickerson's statement in THE OLD ROSE ADVENTURER to be incorrect.
The photos show that there are (at least) two roses going under this name. One is a pink rugosa, which fits the references. One early photo may be of Souv de Philemon Cochet. The most photographed is lovely but not consistent with early references.