Probably completely unconnected but there's a John Horton age 8 with his uncle William J Hockaday age 35 and his wife Harriet age 33 in Chertsey, Surrey. William Hockaday is born in Tavistock, Harriet in St Germans Cornwall and John Horton in Plymouth (so that's a bit out). John's age would be right for someone born in 1862 - later than census day - or early 1863.
