Professor Bruce Ackerman, Sterling Professor of Law and Political Science, of Yale University, will give the Ashby Lecture 2006, entitled Before the next attack: preserving civil liberties in an age of terrorism, at 6 p.m. on 31 May in the Auditorium, Robinson College, Grange Road. Admission is free. For more information, please contact Rossella Wilson (tel. 01223 332368, e-mail rw335@cam.ac.uk).