EL Karleton 1455 Buffy coronas June 28 Tierra Base area, mm Ca, Gulf. 10:45 A.M. Truol recoy with geiger counter. One marked tool gotten (RF2) in pocket geyser burrow 20' N of rock in oven where first group of tools marked (T1-T6?). Picked up first at 5 foot distance within 5 minutes of searching. Cloud 17.6° C. At 10:55 A.M. Substitute in 3" deep burrow 11.5° C. This tool probably had been active on surface. Air temp. burrow recorded 19.8° C. Second tool recovered 3 minute later 30' N x NE same rock. Ad. F (LF4 RH4?) RH4 may be naturally missing. A wonderful method! Geiger tube used at .2 mR range for initial location from distance 4-5 feet. Switched to 2.0 mR range for detecting. Tool actually followed as it moved 3-4" below and among a system of pocket geyser (mice?) tunnels. Trapped her between two openings. Cloud temp 13.5° C. Burrow temps same. (RF2, LF2) on surface. Lucini almost looked shut. 20yds. E of rock. Worked over 10:45-12 noon but only upper '1/5th of total study area and concentrated 100± yards NE Entrance Station where T1-7 marked. Tracolor only instrument used. July 8 Same locality. I began systematic coverage of area about 100 yards NE Station at 8:40 A.M. I spotted an unmarked D with head just protruding from Thermoz burrow within 10 minutes of searching. It was unmarked but a concealed D (RF2) 20" away was detected strongly with Tracolor meter 8m away with my miphr today's. Scale was .2 and meter flooded up to