Checklist

"Equipment for cave exploring includes: a spare telephone, a telephone trumpet... cords and plumb-line for sounding purposes, a measure, some medicines, a flask of rum...knives, thermometer, barometer, pocket compass, paper squared off for topographical drafting, pencils, provisions, and some incense or Armenian paper, which is burned in case there are dead animals putrefying in the depths" - Édouard-Alfred Martel, 1898