Thank you for both postings Frances.
I have held the belief that Thomas Cubbon and Catherine Kewley are the parents of the Thomas I am seeking. Though I cannot confirm at this time.
In 1851 and 1871 he could well be at sea.
In 1861 he is married to Margaret Clugston and is listed as an Ag Lab.
In 1871 she is listed as a fisherman's wife.
As far as I'm aware he lived in Arbory all of his life, until l873.

Thanks again
Ann