Correspondents in File 1 include:
Sanders, N. (Shakespeare Institute, University of Birmingham)
Samarin, R.
Saudek, (no first name given)
Saunders, J.W. (University of Leeds)
Schanzer, E. (University of Liverpool)
Schlauch, M.
Schoenbaum, S. (Northwestern University, USA)
Schoff, F.G.
Schrickx, W.
Scobie, W.D.L.
Scrutiny: A Quarterly Review (letter signed by F.R. Leavis)
Seaman, C.K.
Sen, S.K. (Presidency College, India)
Seng, P.J. (Connecticut College, USA)
Shakespeare Bulletin
Shakespeare Memorial Library (Birmingham Public Libraries)
Shakespeare Memorial Theatre (Stratford-Upon-Avon)
Shakespeare Quarterly (also Shakespeare Club of New York City, Shakespeare Association of America, and Shakespeare Association Bulletin)
Shapiro, G. (Michigan State University, USA)
Shapiro, I.A.
Shaw-Taylor, D.
Shield, H.A.
Shipley, J.T.
Shvedov, Y. (Moscow University)
Simpson, F. (University of Birmingham)
Sisson, C.J. (University College London and the Shakespeare Institute, Stratford-Upon-Avon)
V. Siviter Smith and Company (Designers, Photographers, Photo-Engravers)

Correspondents in File 2 include:
Sjoberg, A. (Royal Dramatic Theatre, Stockholm)
Sjogren, G. (Librarie Marcel Didier, Paris)
Skelton, Thomas (correspondence with Higgins, G. and Ives, E.W. relating to a portrait of the jester to the Bradshaigh family of Haigh Hall c.1650)
Smith, G.R. (Pennsylvania State University, USA)
Smith, I.
Southern, R. (British Centre of the International Theatre Institute)
Soviet News (London)
Spencer, T.J.B. (Queen's University of Belfast and University College London)
Sprague, A.C. (Bryn Mawr College, USA)
Sreenivasan, B.R.
Stamm, R.
Stampfer, J.L.
Stansfield, M. (Waverley Grammar School, Birmingham)
Stauffer, D. (Princeton University, USA)
Sternfeld, F.W. (University of Oxford)
Stevenson, A.A.
Stewart, J.I.M. (University of Oxford)
Stribrny, I.
Studies in Philology (University of North Carolina, USA)
Szyfman, A.
Styan, J.L. (University of Hull).