The clarity and sense of observation led the shepherd to produce a wooden pocket sundial. He carved a flat board from the wood, in the size of his palm. He cut notches in the semicircle and drilled thirteen holes. He stuck a stick in the middle hole that casts a shadow across the desk in the sun. Every fourteen days he stuck the stick into the next hole. The sundials were manufactured and used until the Second World War, and the last makers have retained the skill even in our time.