Step #1: PrevNext
Gather your tools and materials. Find pieces of logs and branches with interesting bark, moss or lichen. Don't worry about the ends of the wood; the log will rest on its side.
Step #2: PrevNext
Fit the drill with the hole saw attachment. Brace the log with your foot, and drill straight down into the side of the log. Hold the drill steady and apply firm downward pressure on the wood. When the saw has sunk all the way into the wood you can stop.
Step #4: PrevNext
Repeat steps 1 and 2 until you have created a hole in the log as deep as your candleholder. As you work down into the wood, it will get a bit harder to find the right angle on the chisel and you will likely have to pry out the last bits of wood by leveraging the chisel instead of hitting it with the hammer.
Step #5: PrevNext
Dust off the sawdust, and drop in your candleholder. You can use these pieces in your Thanksgiving centerpiece, but will most likely want to keep them out all season long.