Dee, I am interested in the Chicago Vehmeyers. Possibly your Henry Frederick is listed in the 1876 Chicago City Directory as a grocer residing at 406 W. Adams. Living at the same address is Frederick C. (probably Christian) Vehmeyer. Fred. is probably the guy who married Eva Emmeline Moore. Her parents are who I am looking at. John Moore, her father is the brother of my George Moore, both born in England. Would be interested in what you know, and would be happy to share any info pertinent to your people.
Donna