There are various kinds of scripts, letters, carved on the granite slabs of the tombs of Ibbankatuwa civilization. It is found that the scripts engraved on pots containing ash and skeletons, had been carved with letters and several signs for identification. These are the evidence to prove that there was letters and signs for communications in this civilization.
In addition to the items considered under the civilizations such as tools, weapons, remains of skeletons of humans and animals, and other fossils, pieces of metal, clay pots, seeds and other different types of articles, the paintings, symbols and geometrical lines give clues of the life patterns of the civilizations of pre historical period.
The forefathers of the Balangoda pre historic human, lived 120 000 years ago, have used the primitive pictures, different kinds of signs and symbols in geometrical lines on the walls of caves and rock shelters by engraving, scratching which have been used as communication.
There are several caves identified as evidence to these communications methods such as Thanthirimaley, Arangoda, Billewa, Adiyagala caves of Anuradhapura Dorawaka cave of Kegalla, Rajagal kanda and Gonagolla caves of Ampara and Padiwettumalei in Sangamankanda of Ampara.
It can be believed that the area around Thanthirimale closer to Malwathu Oya had been a developed civilized from the period of pre historic. Earliest evidence of the pre history of Thanthiimaley can be found at the cave containing the engravings, paintings and other geometrical lines, red and black head unclear leopard or tiger image, humans carrying bows and arrows, sign of sun, animals, birds, and several other images of humans.
Proofs found from Dorawaka Lena of Keggalla can be considered as proofs of the transferring period from Mesolithic to Neolithic. There are signs, letters, paintings and other geometrical lines such as images of sun and moon, arrows, images of fish, elephant, and several other paintings found in this cave.
The image of elephant engraved at the left side of the cave is very much famous and owing to this, this cave is named as “Ethabedi Lena”.
This site is in kotmale in Ampara District. There are some pre historic paintings in one of the caves in Gonagolla, a female dancer and a man painted with colours in red yellow, green and white are visible.