William Stanley Sykes (1894–1961), M.R.C.S., L.R.C.P., M.B., B.Chir., M.B.E., was a British anaesthetist and crime writer.
He was educated at Rossall School and Emmanuel College, Cambridge, served in the RNVR for part of the First World War, and continued his medical training at St Bartholomew's Hospital, London.
[2] He also served as a local government medical officer and public vaccinator.
[1] After the war he returned to general practice and spent more time on his writing.
[1] Sykes contributed an entry to the 14th edition of the Encyclopaedia Britannica on the experimental use of acetylene as an inhalation anesthetic.