Dr. Lockhart Robertson, in the April number of the “Journal of Mental Science,” raises the very interesting question whether the increase of late years in the registered number of the Insane in England and Wales represents an increase, real, or apparent only, in the amount of insanity amongst the population at large. After a laborious collection and study of the statistics relating to insanity, Dr. Robertson arrives at the conclusion that the increase is apparent rather than real—in other words, that the number of registered lunatics has largely increased, but that the amount of insanity amongst the population at large evidences a decline, particularly of late years. As a contribution to the study of this question, I venture to offer a few statistics referring to the insane population in the District of the County and City of Waterford.