I have an Amanda Henry in my line and looking at your tree I thought we should compare notes. My Amanda Henry was born in Madison Co., AR, she was the daughter of George W. Henry. She married Jesse Combs and died 8 Aug 1932 in Madison Co., AR, the same date and place as your Amanda Henry, but this one never lived in MO to my knowledge.
Interestingly, you also have Susan B. Henry, b. 1848 who married Thomas Garrett Lane in your tree (including the info regarding Lane's murder). This Susan Henry is the sister of my Amanda Henry Combs. And both are sisters to my 2nd great grandfather's first wife Margaret Henry Wilkerson. I have a bit more information about this Henry family and tons of information on the Wilkerson line. I would be happy to share if you're interested. You can reach me at LesleeBoyd@gmail.com
Hope this is helpful to you.