A few weeks back I did a video about a trip I took to Idjwi Island with my friend Maia. Whilst going through the photos, I discovered one I'd taken of a strange rock. I thought it might be some sort of carving, so sent it to the Trust for African Rock Art. It appears it might be Batwa hieroglyphs. The chair of TARA sent back some photos of Batwa rock art in Gabon, and the similarity with Knowth in Ireland really got me thinking about other rock art connections.