I went caving yesterday, again down in southern Indiana, with the SJVG. By far it was the most extensive and challenging cave I've ever done. Originally we were going to do some surveying (in two groups of two) but first myself and another caver were going to look around for some missing surveying equipment that was lost in the cave last week. Anyway, it takes over two hours to get to the unsurveyed parts of the cave, and by late in the day I was literally worn out to the point of barely being able to push my pack along as I crawled on my belly through a foot of cold water with two feet of head space. (I've come up with a long list of equipment I'm going to need to go caving as extensively as I want: better knee pads, a smaller pack, neoprene socks, polypropylene coveralls, and a wetsuit. The latter two I borrowed yesterday.) But our search for the missing instruments took long enough that there wasn't time to survey. We entered the cave at about 10:45 am and exited at 6:15 pm. By coincidence the other team exited within 5 minutes; they got a few hundred feet surveyed. Today I am sore all over. I did promise to come back when we can get some more surveying done. The others are a lot faster at moving around in a cave than I am; several times I had to call ahead "are you still up there?" to make sure I wasn't lost and going the wrong way.