I was pleased to see that a bag and a half of coal would keep awash tub full of water and all associated body bits simmering for 8-10 hours. This softens the flesh and fat and makes it easier to remove. Then after leaving the resulting soup for a further 2 days they were ready just to remove the remaing of the bits with your hands.
The result of the rendering, is our first tray of bones
I will be interested to experiment with some of these as I have never worked with bones such as ribs or the spinal column as there is not the same amount of bulk raw material that you find in the leg bones. I am also looking forward to having a go with those because Cyril is possibly the largest ox I have ever had the pleasure to have bones from.