I have a small corner of my yard that is infested with morning glory weed. I have given up on trying to keep it looking nice as a garden area. My plan now is to sterilize the ground, cover it with heavy duty black plastic and a bark mulch of some sort, and place medium to large sized rocks on it, like you would find in a rock garden. I may even place pots here and there with something colorful in them. Just to make it a little more fun and interesting, I plan to collect these rocks from various places I visit. I would like to keep track of where the rocks are from and I am wondering if anyone has a good idea on how to mark them to do this.? So far I have thought of just printing the names of the towns with waterproof paint, or attaching some kind of a metal plate, or even just labeling plant marker stakes and placing one beside each rock. What unique ideas do you have? Just to be clear, I only want to label the rocks with the name of the town I got the rocks from; I don't want to actually decorate the rocks.