A 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 inscribed in ogham, an alphabet used in the early medieval period primarily for writing in the Irish language.
