Don't forget at this period, most part of early opticians in Paris were located Quai de l'Horloge (Chevalier, Wallet, Derogy, Lerebours etc.. ) and often at the same adresses: 31, 33, 65, 67, 69, 71, 77, 77bis Quai de l'Horloge.
At first Chevalier was located at 31 and 33 Quai de l'Horloge, and later Wallet & Derogy, and Hermagis etc...

Numbers from 45 to 77bis disappeared later when the "Square du Vert Galant" was built at this place due to the regular Seine flood. Just behind the great "Statue Equestre du Roi Henri IV".

And It is perhaps at the foot of the statue of Henry IV that the first photograph of a human being was taken. Indeed, the daguerreotype (7.2 x 10 cm) of the Pont-Neuf by Daguerre and Fordos, kept at the "Museum des Arts et Metiers", which shows in its lower part the image of two reclining people (perhaps loaded workers maintenance of the statue) seems to have been carried out during the summer of 1837 (taking into account the foliage of the trees). This photo would therefore be prior to the famous photo of Boulevard du Temple with the shoe shiner.