NYCityMap. The words "Lenox Hill" appear over the area east of Second Avenue, between 59th Street and 79th Street. Searching "Lenox Hill" centers a star on a block on First Avenue between 69th Street and 70th Street. Accessed May 7, 2021.
"Realty Romance in Old Lenox Farm", The New York Times (December 15, 1918); the occasion was the auction of the auction sale an 1874 map of the section of Robert Lenox's farm that lay between 71st and 74th Streets.