Teacher finds stone with ancient ogham writing from Ireland in Coventry garden

Exclusive: Sandstone rock featuring language markings created 1,600 years ago to go on display at museumA geography teacher was tidying his overgrown garden at his home in Coventry when he stumbled across a rock with mysterious incisions. Intrigued, he sent photographs to a local archaeologist and was taken aback to learn that the markings were created more than 1,600 years ago and that the artefact was worthy of a museum.The rectangular sandstone rock that Graham Senior had discovered was inscr