File 1: The correspondents are:
Oliver Sacks, Dr M M Sadek, Prof Carl E Sagan, Ms Satchithanandam, Dr Barbara Szybalski Sandor, (Editor-in-Chief, Gene: an international journal focusing on gene cloning and gene structure and function), Humberto da Costa Santos, Dr Alberto Saoner, Dr D S Sassoon, Ms Jojo V Sayson, Katrina L Kelner (Perspectives Editor, Science), Dr John Searle, Dr Stewart A Seaward (Principal, Del Mar Heights School), Michael I Selzer (Selzer & Selzer), Lokendra Shastri, David Shelson, Dr Yury Shimansky, Mr Harvey Shoolman (Blackwell Scientific Publications Ltd), Mr Hiroki Goto (Editor-in-Chief, The Weekly Shonen Jump, Shueisha, Inc), Dr Philip Siekevitz, P V Simonov, Prof Paul Singer, and Maurizio Iaccarino.
File 2: The correspondents are:
Dr Michael Shermer (Director, Skeptics Society), Prof E C Slater, Mr David C Smith (Science Department Chair, Lower Dauphin School District), Dr John Smythies, Dr Arien Mack (Editor and Director, Social Research), Society for Neuroscience, Jonathan M Spenner, Dr Manfred Spitzer, Dr Larry R Squire, Mr Barry Evans (StarWatch), Mr J M Stark (McKinsey and Company, Inc), Dr Gunther S Stern, Dr John Smythies, Mircea Steriade, Cer Ono Still, Dennis L Stockdale, Hilton Stowell, Dr Jack L. Strominger, Michael P Stryker, Mr Andrew Sugden (Editor, Trends in Biochemical Sciences), Prof N S Sutherland, Larry W Swanson, Mr John Norton (Consul for Sweden at San Diego), Mr Christopher Sykes (Christopher Sykes Productions), Michael Kuperstein (Chairman, Symbus Technology), and Dr W Szybalski.
Letters detailing sensitive personal circumstances have been extracted to files PP/CRI/J/1/3/21-22.