The obligation of keeping sufficient arms according to each man's estate was preserved by a statute of Philip and Mary, which made some changes in the rate and proportion as well as the kind of arms.[219] But these ancient provisions were abrogated by James in his first parliament.[220] The nation, become for ever secure from invasion on the quarter where the militia service had been most required, and freed from the other dangers which had menaced the throne of Elizabeth, gladly saw itself released from an expensive obligation. The government again may be presumed to have thought that weapons of offence were safer in its hands than in those of its subjects. Magazines of arms were formed in different places, and generally in each county:[221] but, if we may reason from the absence of documents, there was little regard to military array and preparation; save that the citizens of London mustered their trained bands on holidays, an institution that is said to have sprung out of a voluntary association, called the artillery company, formed in the reign of Henry VIII. for the encouragement of archery, and acquiring a more respectable and martial character at the time of the Spanish armada.[222] The power of calling into arms, and mustering the population of each county, given in earlier times to the sheriff or justices of the peace or to special commissioners of array, began to be entrusted, in the reign of Mary, to a new officer, entitled the lord lieutenant. This was usually a peer, or at least a gentleman of large estate within the county, whose office gave him the command of the militia, and rendered him the chief vicegerent of his sovereign, responsible for the maintenance of public order. This institution may be considered as a revival of the ancient local earldom; and it certainly took away from the sheriff a great part of the dignity and importance which he had acquired since the discontinuance of that office. Yet the lord lieutenant has so peculiarly military an authority, that it does not in any degree control the civil power of the sheriff as the executive minister of the law. In certain cases, such as a tumultuous obstruction of legal authority, each might be said to possess an equal power; the sheriff being still undoubtedly competent to call out the _posse comitatûs_ in order to enforce obedience. Practically, however, in all serious circumstances, the lord lieutenant has always been reckoned the efficient and responsible guardian of public tranquillity.