By J. Wilks, Eileen Wilks
By Eric Partridge
By Michael J. Denham
By Gerhard Benecke
By Patrick Howarth
By Michael Stubbs
By Andrew Roth
By James Joll
By John Triseliotis
By Lord Drogheda, etc.
By John Eric Mayer, Professor Noel W. Timms
By Eric Hoyle
By P. D. Ouspensky
By Sir Gerald Nabarro