Pigot's Directory for Kent 1839

Croydon: Nobility, Gentry & Clergy
Mr Richard Sterry, Oakfield lodge

Kelly's Directory for Kent 1918 [Ancestry]
Private Residents
Sterry John Suffolk place, Sevenoaks

Kelly's Directory for 1922 [Ancestry]
Trades - Medical List
Sterry & Alexander, Riverhead, Sevenoaks
m*Sterry John O.B.E. (firm Sterry & Alexander), Suffolk place Sevenoaks & Shoreham, Sevenoaks

m*=Members of Royal College of Surgeons