Without any assigned cause, this epidemic of possession diminished and the devil disappeared.
Not long after this, Prof.Tissot, an eminent member of the medical faculty at Dijon, visited the spot and began a series of researches, of which he afterward published a full account.

He tells us that he found some reasons for the sudden departure of Satan which had never been published.

He discovered that the Government had quietly removed one or two very zealous ecclesiastics to another parish, had sent the police to Morzine to maintain order, and had given instructions that those who acted outrageously should be simply treated as lunatics and sent to asylums.

This policy, so accordant with French methods of administration, cast out the devil: the possessed were mainly cured, and the matter appeared ended.
But Dr.Tissot found a few of the diseased still remaining, and he soon satisfied himself by various investigations and experiments that they were simply suffering from hysteria.

One of his investigations is especially curious.