Sam was the younger brother of Demelza and the older brother of Drake Carne. Their father, Tom, was once a drunk who used to hit his sister. Demelza fled home, while Sam stayed with Tom who eventually changed and became a Methodist.
Sam also came to share the same belief, and became a devout Methodist.
At some point, Sam left home too with Drake and moved to a place by Demelza's home in Nampara.