Looking for the village of Alcon in Alsace in 1861
I am trying to find the location of my grandfather's birth. The name of the town is ALCON in 1861, not sure about the exact spelling, but it is spelled this way on his military record.
I believe it may be a town, village, community that no longer exists, maybe destroyed or merged into a larger place, or the name changed.
Are there any old maps for Alsace in 1861? Where do I look?