Dear unknown relative, My name is Heidi (Cornell) Broadbent.  Robert Riley Maxwell was also my great great grandfather.  His daughter Leona Jewel was my great grandmother and her daughter Wanda Lou (Ellis) is my grandma.  I have been searching for months and months trying to find more info.  on Robert Maxwell.  All I know is that he was married to Sarah Stamp or Stamps, they had 6 children: Ben, Less, Bud, Ruth or Benny, Leona, and Leona's twin who died at birth along with the mother Sarah.  Robert Maxwell died about 1917 from a wagon accident or something like that.  As far as I know they were all in Oklahoma.  I might have a picture of Robert but I'm not sure.  I'm going to visit my Grandma for Thanksgiving and see if I can find out some more information.  I can't find Robert or Sarah on Ancestry or anywhere and have been really frustrated.  I'm so excited that I found your posting.  Just tonight I was scanning in pictures of my grandma's.  You might be interested in some of them.  So, you are a descendant of Robert's brother Jess? I'll let you know if I find anything else out this coming up week.  Until then, I look forward to hearing from you. -Heidi