I have a question that has been bugging me for about five years now. Maybe someone out there can help me out!

Back in 2000, some children stumbled across some old headstones in the woods. I and a coworker went out to see them. The two legible headstones both contained the inscription: Faithful Member of Lily White Circle No. 1320. Since then, three other headstones in a nearby cemetery have been found that have this same inscription. Is anyone familiar with this organization? A local church and civic leader seems to think it was a missionary society. All the headstones date to the 20's. Any and all help would be appreciated!