Other crafts include pottery and wood carving. Perry's work refers to several ceramic traditions, including Greek pottery and folk art. After experimenting with pottery and dishes he moved into large ceramic murals. The chevron occurs in early art including designs on pottery and rock carvings. The figures were composed of clay and fragments of pottery. The potters used a bow drill to produce the fire needed for baking the pottery. Clay for the pottery is sourced locally. There was an increase in artisans, who worked in pottery, jewelry, and textiles. Following is a list of different types of clay used for pottery. It has one of the best collections of Pre-Raphaelite paintings, majolica pottery, and English silver. Petrie developed the system of dating layers based on pottery and ceramic findings. They were experts in metalwork, pottery, and weaving raffia cloth. Pieces of Roman pottery and mosaics were found in the upper layer. There were even manufactories specialised in imitating ancient pottery. Near the rectangular there are also burials with pottery and stone offerings.