Kay 999, thank you so much for searching for this information. You have found the right family members.
It certainly seems that James Rogers did not live in the US for long after getting his citizenship and ties in with family stories of him retuning home to the UK, sick and dying there. The story of him going to the US ties in with him being a tin miner. I suppose at that stage tin mining, always hard, was in decline and the California gold rush was on, although if memory serves me, also starting to decline. Not an easy life for anyone in the family.
I believe three female family members, Annie, Millicent and one other are buried together in the Methodist chapel, Cambourne cemetery.
Again, I much appreciate our help.
Anton