Another Headstone

I was just at the St. James Cemetery in St. Paul, Lee County, Iowa a couple of weeks ago and got a photo of my great-great-grandmother's headstone. I was quite happy. This morning I'm disappointed in myself that I didn't do more research before going. I have discovered that there is only one ancestor that died in the United States whose headstone I don't have a photo of. That is Johann Heinrich Kempker, AKA John H. Kempker, born 1797, died 1872 in St. Paul, Lee County, Iowa. This is my great-great-great-grandfather, he's buried in St. Paul, he's the last ancestor's headstone I don't have that I could expect to get a photo of easily, I was there a couple of weeks ago and didn't get a photo.