A memorial stone placed at the head of a grave is a headstone. To remember those who had come before; name, date of birth, and date of death...a life span in between. Such is shown below.
Now seeing a picture of those folks as buried there...especially if more than a century ago...is not that common. Here is the picture of Edward T. and Ellen Henderson in the same position as they are buried above. I am sure that when the picture was taken they had no idea that they would end up in the grave as shown. The span of their life past down their combination of genes to my grandfather, then father, and then me.