So Harry was the son of Beatrice; hence g/son to Jean/Jane on the 1861 census. I am gobsmacked to be honest. This is fantastic. I didn't try the various spelling of 'Gray'. Should have done so. So perhaps little Harry's father must have been a Farquharson. There was always some suspicion about Harry's birth and no record with the family. Maybe Harry's dad had a slip between the sheets with Beatrice.
So wonderful; thank you so much. Will update when I receive the marriage cert. in 1894.