Reminds me of the old times when we set out to find some black hole in the El Abra based on aerial photos. If we were lucky, there was a topo map of the area but that wasn't a lot of help once you were on top of the range. You plotted out the best course based on the available maps and aerials, and set out chopping through the jungle on a compass bearing, often for kilometers, hoping to find a hole that was often a fairly small target. Sometimes you found a great cave, sometimes you just enjoyed the jungle experience. I must admit having GPS would have been nice. Jerry.
