Thank you.
Yes conditions are probably hereditary.
Joseph (born Wiltshire, Mildenhall) the Brother of my direct line ancestor Henry Hutchins was taken in to the Maidstone household of Charles Marsham, the Earl of Romney.
Family account was that when the Census Enumerator came to the household a heated exchange took place, because the Earl refused to have him declared Deaf and Dumb and I see he was recorded as 'Odd Man'.
If you look at the 1861 Census page (aged 30), you will see the capital letter 'D' written (added in another hand) next to 'Odd Man', rather than in the column.
The intervention of the Hutchins's and Earl of Romney, probably prevented Joseph from being institionalised. The Steward & [?] 10 years later is likely him.
Kind regards Mark