Despite its name, Manhattan State Hospital was in Islip, Suffolk County. A quick Google search doesn't turn up a history of it, but there are photos and it was there in the 1960s when I visited my sister. It was a scary hospital, feared by patients with kinder therapies.
Jessica Skippon, London, England
researching Schanzer,, Borger, Birn and Jachzel in Andrychow, Wadowice, Bielsko Biala and Berlin.