This custom was discontinued, however, in the days of the fourth shōgun, though the rule that the barons with their wives and children must reside for a given time in the capital every second year was enforced up to within five years of the restoration. One consequence of the rule was that the feudal lords built mansions for themselves in Edo, some owning three, some as many as six, of such city residences, their inmates varying from hundreds to thousands. The effect thus produced upon the prosperity of the capital may easily be conceived. It was also the custom under the Tokugawa régime to prevent undue accumulation of wealth in the hands of individuals by ordering conspicuously rich folks to carry out some great public work at their own expense. In fact, no means were neglected to prevent the feudal barons from developing inconvenient strength. In addition to these rules, exact and rigidly enforced laws--called _buke hatto_, or military statutes--were enacted for observance by feudal chiefs and _samurai_ in general. The first body of such laws, comprising thirteen articles, was promulgated in 1615. Subsequently, the laws were repromulgated on the accession of each shōgun, sometimes with modifications or additions. The principal provisions of these statutes were: that attendance in Edo must be as punctual as possible; that no new castles must be built; that repairs of old ones must not be undertaken without special permission; that leagues must not be formed; that marriages must not be contracted without due permission; that garments must be worn and methods of conveyance employed such as suited the rank of the wearer or traveler, and so forth; these vetoes being supplemented by provisions for encouraging the pursuit of military and literary professions, the practice of frugality and other virtues.