derangement which have fallen under the author's personal observation.

The author has to acknowledge the kindness and assistance which he has received from Dr. Crichton Browne, of the West Riding Asylum.

He would also desire to express his thanks to Mr. Frederick J. C. Ross, of the Middle Temple, for the assistance which he has afforded while the work was passing through the press.

5, ESSEX COURT, TEMPLE;

6th June, 1871.