Sax Rohmer,
Brood of the Witch Queen — CHAPTER XI.
(1918)
“ Sime stared."Eh!" The medical man had suddenly come uppermost; he recollected that this class of discussion was probably taboo."You may doubt the existence of Efreets," continued Cairn, "but neither you nor I can doubt the creative power of thought. If a trained hypnotist, by sheer concentration, can persuade his subject that the latter sits upon the brink of a river fishing when actually he sits upon a platform in a lecture-room, what result should you expect from a concentration of thousands of native minds upon the idea that an Efreet is visiting Egypt?" ”
