I am an Arnhart but haven't figured how Mary E.fits into
the tree. Found some of your tree on Ancestry.com,gene pool
individual records. Seems Mary E. and John R. Ricketts had 2 sons,
Charles Burton,dob 1 or 11, Nov. 1882 and Will, 7 July 1872
Charles married Nora Matlock, 15, Dec. 1905. He and Will both died in OR.
There were a lot of Arnharts from Barry Co, Mo, It might be a place to
start since the Ricketts were also born there.
Margi