Hello out the,my name is Kenneth. I just got my computer not to long ago and I hope I'm doing this right. I recently did some work in my back yard,and I took a side walk out that has been there for over 30 year's. I dug about one foot below,where the side walk had been,and I found about 20 old marble's,some of them are wooden. If anyone know's anything about old marble's,I would appreciate hearing from you. Kenneth