Early Quakers, believing in equality, banned gravestones. They saw them as a display of vanity which could elevate one person above another. This testimony of equality partially explains why a large portion of the original Newtown Square Quaker graveyard has very few gravestones. Then in the early 1800s, the Quakers relaxed this restriction. There were and still are limitations to a gravestone's appearance. Markers are simple, with just a name and dates and no ornamentation. There is usually a limit on height and size. You'll see this if you walk through the Newtown Square Friend Graveyard. 

Originally, friends were not buried in family plots. They were buried chronologically. So if you look at the graveyard records, you'll notice that unrelated people are buried next to each other. This restriction also eventually changed. 

Looking at the picture to the left, you'll notice that the meeting added a new plot of land in 1866 to the original graveyard. Then the final portion toward the southern border of the property was added. This last area does include family plots, and Friends are still being buried with their loved ones.