Hauken, James 1975 Journal Mexico trip : Ahuacatlan area 4 May 1100 hrs. seen flashing alongside the road, but (cont'd) they too were many and none were collected. Time of observation : 0945-1130 hrs. We continued E on Mex 120 into the state of San Luis Potosi and the town of Ahuacatlan. Some Street had been given by Las Redely locality data for caves in the area, and we attempted to locate them. In Ahuacatlan we looked for the Cueva de la Iglesia (Cave of the Church). After many blank stares or directions of dubious validity (including one man who simply left us at the Camichin) we found an old man who offered to show us the path to a cave ~.5 km E of Ahuacatlan which is the source of the town's water. The path he showed us was ~200 yds W of the correct one which caused a walk of an extra km or two covering ~500 vertical feet. However, we found the cave at the base of a ravine below the road and a family was there doing their wash; apparently many families in the area use it as their source of water. The cave is ~15' wide for about 40' while it descends at an ~20° angle for ~75 yds, until water is found in a small shallow pool in a larger