Hi there, Sorry I have been so long replying. I couldn't find John Morgan's death certificate. Have now been successful. He died in 1881, aged 61. The certificate states he was suffering from bronchitis and had been for 2 years, asphyxia and general anasarca. He probably had heart problems but I think the conditions combined fit in very well with a life quarrying limestone.
You could also argue they fit in with starving to death as well but I prefer the idea of the congested lungs!

He seems to have been living in Joys Green when he died. He was brought up in Moorwood along with his wife Hester.