MIDDLEBURY — Immigration expert Harriet Orcutt Duleep will deliver the fall 2013 edition of the D.K. Smith ’42 Lecture on Tuesday, Sept. 24, at 4:30 p.m. at Middlebury College’s Twilight Auditorium. Orcutt is research professor of public policy at the College of William and Mary. Her lecture is titled “The New Immigrants — Blessing or Bane?”