10 two canvas plus three leather pads above the knee, together with a wooden wedge below his heel. Ashley used a one-tined pick like an antler (see figure 2) and the section of the mine-shaft (about 35 feet deep)' is illustrated in figure 1, which shows the different layers and their colloquial names. Knapping: A three to four pound hammer (figure 3) was used to split ("quartering") the mined flints: then a two to two and a half pound hammer (figure 4) roughly flaked the "quarters", then a ground- down file (figure 5) made into the knapping hammer, was used and it needed sharpening every two weeks. All the hammers must be tough and NOT too-highly