AKP 1973 for a while. Then on to the yarita cap to pick up a plant specimen, measure Carol's nails and assess the lizard - toad situation. OP decided we could do better, so we headed on to Challapalca. At this point Dave and I were both feeling altitude effects which continued to bother us the rest of the afternoon. We set up the tent in the little side road that goes across the little stream paralleling the road. I put out five long Sherman's with corn and dried sweet bait around the tent. Thursday, March 15 Challapalca Frost this morning - all the five traps looked cold and untouched. I had a mild headache all night, which improved considerably with an aspirin - codeine pill Dave had in his pack. We jotted around looking for lizards and toads, and taking it easy. Heard Jirandis this am. Have located a number of lizard and toad holes, and OP has been getting his little transmitter ready for testing tomorrow. (10:30 - 11:30) Watched a lizard rock this afternoon for a while, but no activity. Clouds blew in this afternoon and we are having rain and hail - of a kind. Went out with flashlight after dinner and found several toads hopping around. Friday, March 16 - Challapalca Headache had most of morning. Watched lizards and toads - both of which seem to spend