If you will visit www.findagrave.com and view the memorials shown at Pleasant Hill Cemetery, Cass County, Missouri you will see a lot of photos of the burials of Knorpp family and others. I volunteer for that web site and took the photos at the request of one of the family members in Texas who could not get to Missouri to take the photos. She might be interested in your research or she might be able to add to it. She is the person who posted the memorials, I only took the photos because I was, at that time, living near Pleasant Hill.