Hello Jackie,
I expect you've probably got this info already - but heregoes.
I found John Tellore (Terlour) on the 1851 Census for Alverstoke living at 42 Wyper Alley with Mary Ann and children Harriett & John. John, a waterman, born Falmouth in 1814.His father was also John and a yeoman.
In 1851 census for Devon, found Abednigo Terlour, aged 70 living with wife Betsey in Plymouth. He was also born in Falmouth. I wonder if John senior and Abednigo were brothers? This might mean that my ancestor, James Henry (born Plymouth circa 1820) might be one of their sons and brother/cousin to your John. Unfortunately I have not been able to trace him prior to living in London.
I made contact several yearsago with a lady from Portsmouth researching her husbands family - he was from the King family - I believe Robert Stone King married Harriett Ann Terlour?
I have got lots of name sof Terlours I have found in BMD and Censuses , but nothing else about the earlier ones.
Hope this helps,
Sally