Satanic agency and mesmerism reviewed. In a Letter to the Rev. H. Mc. Neile A.M. of Liverpool: In reply to a sermon preached by him in St. Jude's Church, Liverpool, on Sunday, April 10th, 1842.

Braid’s scientific investigations of mesmerism convinced him that its effects did not depend on an outside force, but were natural phenomena arising from the subject’s heightened suggestibility. This 10-page pamphlet contains his first statement of these discoveries and contains the first use of the term “neuro-hypnotism”, which Braid coined to replace the unscientific “mesmerism” and “animal magnetism”.