My relation Samuel Venn also died young in 1878 - at the age of 6 - in Panteg Monmouthshire and his cause of death was recorded by the Coroner as natural causes. I wonder whether such referral to the Coroner was routine in those days when children died young. A helpful lady at Gwent Record Office in Cwmbran said that often there were Coroner's Reports but none had survived for poor Samuel. A referral to Gloucester Record Office would seem in order.