Hi Rutlander
Mary bird was my great great grandmother,she and Francis appear together in the 1871 and 1881 census records and she has his name on them,but the only marriage record I can find is for Francis Zipfel in the 2qr of 1887.Anna Maria was born in 1869 and appears on the 1871 records with both of them.
Sorry i don't have a lot of info on the Zipfel side yet but I have rather a lot of names on the Birds side.