The head frame made of logs at the Charley Ross mine. When I first saw this mine in the mid 1970s the head frame was still intact. The shaft was near vertical and I repelled down the shaft to check out the working. I almost got in a bit of trouble. I had a waist harness and my rope was attached there thru my carabiners and brake bar. Had a chest harness and a rope with prusik (sp)knot tied to the rope in case something happened. I was pushing off the wall and dropping down on the rope. Had the prisik knot in my left hand and it slipped thru hand and tightened up on the rope. My feet had been on a stull or cross timber in the shaft and had dropped down below it till it was at my waist. Now the problem, the prisik knot was holding me and the only way to release it was to loosen it. To loosen it I had to come back up the rope. The stull kept me from being able to touch the side of the shaft and getting a toe hold. If I let loose of the rope with my right hand to pull myself back up the rope the knot would tighten. Finally was able to pull myself back up the rope enough to loose the prisik and make it slide again. Continued on down to the bottom of the shaft. At his point I shorten the rope on my chest harness enough so I could reach it when knot was tight. Learned a good lesson that day.