London: Archaeologists have discovered in Britain one of the earliest examples of crayon -- possibly used by our ancestors 10,000 years ago for applying colour to their animal skins or for artwork. The ochre crayon was discovered near an ancient lake, now blanketed in peat, near Scarborough in North Yorkshire. An ochre pebble was found at another site on the opposite side of the lake. "The pebble and crayon were located in an area already rich in art. It is possible there could have been an artistic use for these objects, perhaps for colouring animal skins or for use in decorative artwork," said lead author Andy Needham from University of York.