It is true that one particular operator alone may be able to hypnotize a particular patient; and in this case the patient is, when hypnotized, open to suggestions from that person only.

He is deaf and blind to everything enjoined by anyone else.

It is easy to see from what has already been said that this does not involve any occult nerve influence or mental power.

A sensitive patient anybody can hypnotize, provided only that the patient have the idea or conviction that the experimenter possesses such power.

Now, let a patient get the idea that only one man can hypnotize him, and that is the beginning of the hypnotic suggestion itself.