This is very interesting because my grandfather was Aaron Johnson. He had 3 sisters. I believe one of them married into the Harris family. My grandfather's father, Lance (Land) Johnson is reported to have had some siblings. I am currently searching for them. It is possible that there is a link here somewhere - Maybe Walter's sister married a Johnson related to my Lance Johnson. I will keep you posted. You can e-mail me outright at email@example.com
Other surnames in my research are Black, Mitchell, Gordon. The Black's and the Mitchell's are having a reunion here in Chicago this coming August. I hope to find out about the Harris side at that time. I will keep you posted.