Fujichrome Sensia 100, OM-2S, 21mm lens, B-setting at f/3.5, 3 GE Press 22's, 1 Westinghouse FP31, and 1 Mazda #10 foil flashbulb, tripod.
"Looking deeper into the cave, out of Chamber Three. This image shows much of the 400x700 foot area of the room."