Hi, I am NOT working on this family but came across this while looking for Jenkins. Hope it helps someone! I am also putting it on findagrave.

"Mr Editor of Standard journal of Dec 10. Your sketches Walks on the Black Fork have been read with much interest and have revived many faint recollections of many ______ ______ and rambled over when I was a small boy. I well remember seeing the monument or as I remember it at that time a white marble slab at the grave of Amos Jenkins. It was only a few rods from the road we went to and from the home of Josiah Jenkins. I always had a childish fear come over me as I was passing the lonely spot. I have no data of the death of Hester Jenkins. She lived a good many years after her husband died. A quarter of a mile or more east of the Jenkins cemetery on the crest of the ridge, Jessie and Lizza Radabaugh were buried. They died respectively about 1840 and 1845, I have no knowledge of there ever being a marker of any kind erected at their grave but hope they have been properly cared for. "
Henry Ewing,Ohio Pioneer

http://familytreemaker.genealogy.com/users/h/a/r/Rick-R-Hart...

Jenkins Cemetery is now called Woodbridge and is in Sec 20 of Woodbridge Twp,Hillsdale County,Michigan.
I am not too far from there so I will go look sometime soon.
I have done a quick search and looks like most of the descendants have these 2 dying in Racoon,Jackson,OH but no proof.
Here you go!
Anyone that has any info on this please contact me.
Respectfully,
Sandra