Hi Jim, Think of 67 and 68 like the first two digits of a zip code. They relate to specific areas in France. If you google France 67 or France 68 you can see them. 67 is Bas-Rhin in the Alsace area. 68 is Haut-Rhin in Alsace.
Sorry, Luc did not send me the link to the registers of emmigration. The link I sent was for a variety of French genealogical sites. I thought it was among them.
I will ask him where those are online.