Hi Lori,
My great grandfather was Louis Alphonse Napoleon CARDON, b. 1851 from France, possibly near Lille. His father’s name was Frederick. Louis married Alice ASHTON in London, 1876, and they had 4 children, Louise Cardon (my grandmother) and Héléne, Maurice and Frederick Cardon, who were all living at the same address in Holborn in 1901.
I know that these are almost certainly different Cardons to the ones you are researching, but I wondered if by chance you might have come across anything, particularly about Cardons in Northern France which might link to my great grandfather?

Regards

Graham H