Thanks for the information - that was really fast!
The George Vonderlehr marriage to Mary Nebuhr I had from another source.
The Walter's don't look like they fit the bill.
Another researcher, who brought this to my attention, has a marriage certificate for William Vonderlehr and Edith Ray in 1886. I haven't seen a copy yet, but she is trying to get it to me. Assuming that it is correct, then they were married in Chicago, so it should be listed in the source you provided.