Math Department in Cambridge

Photo taken in the summer of 1981 on the roof of the Math Department in Cambridge, on the occasion of an informal gathering of topologists in the summer of 1981.I have indicated their current affiliation (if known to me).

First row: Andrew Casson (Yale), Larry Siebenmann (my thesis adviser, Paris XI), Raymond Lickorish (Cambridge), Steve Bleiler (Portland State), Lucia Contreras-Caballero, Paul Melvin (Bryn Mawr), Jean-Pierre Otal (Toulouse), Guillermo Sienra (U. Autonoma Mexico), Tim Cochran (Rice), Dave Schorow.
Second row: Bill Menasco (Buffalo), Daniel Lines (Dijon), Alain Caudron (Paris XI), Dennis Barden, Ken Millett (UC Santa Barbara), Cameron Gordon (UT Austin), Selman Akbulut (Michigan State), Rob Kirby (Berkeley), Joel Hass (UC Davis), Bob Edwards (UCLA).
Third row: (hidden) Ric Litherland (Louisiana State), Marty Scharlemann (UC Santa Barbara), Francis Bonahon (yep, with the beard), John Hempel (Rice), Alex Suciu (Northeastern), A. Lascurain (U. Autonoma Mexico), John Conway (Princeton).
Fourth row: David Seal, Francoise Michel (Nantes), Darren Long (UC Santa Barbara), Danny Ruberman (Brandeis), D. Andrus, Claude Weber (Geneva), Iain Aitchison (Melbourne), Peter Scott (U. Michigan),  Bob Penner (USC), John Rickard.