John Walkers gravestone in the churchyard at Norton Parish Church. The original gravestone crumbled and was replaced by Teesside Borough Council in 1974. Photograph kindly donated by the husband of the late Doreen Thomas (Author of Strike a Light – the Story of John Walker) 
Picture Stockton Archive
A Pictorial History of Stockton-on-Tees
According to Stockton Council”s own website the John Walker gravestone is preserved at the Green Dragon Museum, Stockton. Last time I called in there I was surprised to see that all of the local history displays had been removed. I wonder if the gravestone has been relocated as well ?