The family are living at William and Rosa Venner. Which date do I use? 2 Pinkham Cottage Carkeel, Saltash M.B., Cornwall
He was baptised 22 March 1874 - birth registered March Quarter 1874 (Vol 5C/, Page 30 - Launceston Reg District) so if you take the 25 Dec date, it would have to be 1873. I think his birth certificate is the only way you will be able to tell.