The penalties for the non-observance of these requirements were as follows--(_a_) Any ticket-of-leave man, convicted of an indictable offence, _ipso-facto_ forfeited his license, and this in addition to any punishment to which he might be sentenced upon indictment; (_b_) Any ticket-of-leave man proved to have transgressed the conditions of his license by an act not of itself punishable either upon indictment or upon summary conviction, nevertheless rendered himself liable to be summarily punished by imprisonment not exceeding three months. In 1871 the "Prevention of Crimes Act,"[242] amending "The Habitual Criminals Act" of 1869, extended the principle of keeping notoriously bad characters under observation, by enacting that persons twice convicted of certain crimes may be subjected to police supervision for not more than seven years after the expiration of the sentence imposed, provided that a previous conviction for an offence in the same category is proved at the time of the second conviction. Such persons are commonly called 'supervisees,' and they come under the same conditions as license-holders. These conditions have since been modified by Acts of Parliament passed in 1869 and 1891, and they may now be summarized as follows. Both ticket-of-leave men and supervisees are required to report themselves within forty-eight hours after their arrival in any police district to the Chief-Officer of Police in that district, to report themselves once a month afterwards,[243] and to notify any change of address to the same authority; they are also expected to satisfy the police that they are earning their living by honest means. A constable is justified in arresting without warrant any license-holder or supervisee whom he reasonably suspects of having committed an offence, or of having failed to comply with the above-mentioned conditions; and if it be found, after investigation by a competent magistrate, that such an offence has been committed or default made, the license-holder thereupon becomes liable to the forfeiture of his license, and the supervisee to imprisonment with or without hard labour for a period not exceeding one year, unless he can prove to the satisfaction of the proper authority "that being on a journey he tarried no longer ... than was reasonably necessary, or that he did his best to act in conformity with the law."[244]