Another book of interest is Buried Alive by Jan Bondeson (https://www.amazon.com/Buried-Alive-Terrifying-History-Primal/dp/039332222X/ https://www.amazon.com/Bu

Another book of interest is Buried Alive by Jan Bondeson (https://www.amazon.com/Buried-Alive-Terrifying-History-Primal/dp/039332222X/ https://www.amazon.com/Buried-Alive-Terrifying-History-Prima...), which covers the steps that were taken to prevent premature interment, including the ways death was diagnosed.