Discovered today, my research was real wrong and the chocolate shop, “Maison Georges Larnicol” at 14 Rue de Rivoli in Paris is still there! Dieu merci!
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There was and is, a “corner joint”, Le Bûcheron, just down the stairs and around the corner, from an apartment on Rue Ferdinand Duval, Paris.

Searching today, I discovered the Chocolate Shop next door is no more. Post dinner, it was a wonderful stop before late evening home.
The meals and memories, are delicious