It would, perhaps, in any case, have been impossible to have given a definite opinion on the value of the system until a longer period of time had elapsed. Such a judgment is rendered more difficult by the fact that the operation and effect of the System has been, of course, greatly affected by the intervention of the Great War. However, reports of the Central Association, to whose care these men are entrusted after release on conditional licence, and the reports of the Advisory Committee (an unpaid body unconnected with official administration appointed by the Secretary of State, under the Act, to advise him when, in their opinion, conditional liberation may be opportune without danger to the community, and _with reasonable possibility of good behaviour_), furnish material on which an estimate may be formed, both as to the future working and the success of the system. Since the Act came into operation on the 1st August 1909, 577 persons have been sentenced to Preventive Detention. Of 389 cases released, no fewer than 325, or 84 per cent., were considered sufficiently promising to be released on licence, while of the remaining 64 who served their whole sentence of Preventive Detention, many were mentally or physically deficient. Of the 389 cases, the Central Association has recently reported that no unsatisfactory report has been received in the case of 210, or 54 per cent. The singular success of the Central Association in dealing with these cases on discharge, representing, as they do, the worst and most dangerous class in the community, naturally suggests reflection as to the comparative merits of the systems of licensing on discharge from Penal Servitude and Preventive Detention, respectively. Under the Penal Servitude system, a convict can, by industry and good conduct, reduce his sentence by as much as one-fourth. On discharge he remains, during the unexpired portion of his sentence, under a licence which compels him to report his place of residence to the Police of the district, and to notify them of his intention to remove, and of his arrival in a new district, and to report to the Police once a month. A prisoner under Preventive Detention remains in custody only until the Advisory Committee are able to report that, if licensed, there is a reasonable probability of his abstaining from crime; but he is licensed, not to the Police Authorities, but to the Central Association--a voluntary Association subsidized by the Government for the after-care of convicts. The form of licence is quite different from that used on discharge from Penal Servitude, and compels a man to proceed to an approved place, not to move from that place without permission, to be punctual and regular in attendance at work, and to lead a sober and industrious life to the satisfaction of the Association. The Police licence may be described as negative in character, _viz_:--it only prescribes that a man shall abstain from crime. The licence to the