I am looking for information on my great-granfather who was a Crance, from Lorraine and migrated to the USA perhaps 1865 to 71. He may have grown grapes. I think he was born in Lorraine about 1850 or so. In the USA he had a son, John in 1883. I am coming to Lille from Australia in late September to research the Crances. Any suggestions how to do this?