Pre-1965, what two counties was this suburb of North London located in, which is also the birth place of Marc de Henrie?
Marc Henrie: Marc de Henrie (born in Cockfosters, Hertfordshire, United Kingdom) is a British photographer. Cockfosters: Cockfosters is a suburb of north London, lying partly in the London Borough of Enfield and partly in the London Borough of Barnet. Cockfosters:  Cockfosters was located pre-1965 in the counties of Hertfordshire and Middlesex.
Hertfordshire and Middlesex