The annual Leon Levy lecture will be held at the Waccabuc Country Club Carriage House on Sunday, Feb. 24, at 4 p.m. Admission is free. Author and historian Alex Shoumatoff will present the history of the great estates of northern Westchester, particularly South Salem, and talk about how those estates influenced local conservation efforts. Speaker, author and historian Philip Kunhardt will introduce the program. The program is sponsored by the Westchester Land Trust, Lewisboro Land Trust and town of Lewisboro through a gift from the Jerome Levy Foundation. To RSVP, email firstname.lastname@example.org.