It is proposed to hold the 80th meeting of the Peripatetic Seminar on Sheaves and Logic in Cambridge during the weekend of 3/4 April 2004. Further details of the arrangements will be announced by mid-February; in the meantime, any queries may be addressed to the organizers, Eugenia Cheng <e.cheng2@dpmms.cam.ac.uk>, Martin Hyland <martin@dpmms.cam.ac.uk> or Peter Johnstone <ptj@dpmms.cam.ac.uk>.