cave painting

For several decades, now, he [the modern artist] has taken the liberty of learning how to draw and compose by studying and borrowing ideas from the high periods in all art, as far back as prehistoric cave painting.

I understand from Paṇḍita Baghavánlál, who lately visited the caves, that the painting and writings in these caves are fast going to decay. Those at Ajaṇṭhá are more durable, whereas the Bagh cave paintings will, it is feared, be entirely obliterated after some years.