No evidence of very old cotton batiks have been found in India but frescoes in the Ajunta caves depict head wraps and garments which could well have been batiks. In Java and Bali temple ruins contain figures whose garments are patterned in a manner suggestive of batik. By 1677 there is evidence of a considerable export trade, mostly on silk from China to Java, Sumatra, Persia and Hindustan. In Egypt linen and occasionally woollen fabrics have been excavated bearing white patterns on a blue ground and are the oldest known and date from the 5th century A.D. They were made in Egypt, possibly Syria. In central Africa resist dyeing using cassava and rice paste has existed for centuries in the Yoruba tribe of Southern Nigeria and Senegal.