“The municipal corporation known as the city of Denver, and all municipal corporations and that part of the quasi-municipal corporation known as the County of Arapahoe, in the state of Colorado, included into the exterior boundaries of the said city of Denver, as the same shall be bounded when this amendment takes effect, are hereby consolidated and are hereby declared to be a single body politic and corporate, by the name of the city and county of Denver.” By this same amendment the city and county were declared to be a single judicial district of the state, and county officers were disposed of by prescribing that “the then mayor, auditor, engineer, council (which shall perform the duties of a board of county commissioners), police magistrate, chief of police and boards, of the city of Denver shall become respectively, said officers of the city and county of Denver, and said engineer shall be _ex-officio_ surveyor and said chief of police shall be _ex-officio_ sheriff of the city and county of Denver; and the then clerk and _ex-officio_ recorder, treasurer, assessor and coroner of the county of Arapahoe and the justices of the peace and constables holding office within the city of Denver, shall become, respectively, said officers of the city and county of Denver, and the district attorney shall be _ex-officio_ attorney of the city and county of Denver.” In 1913 an amendment to the Denver charter, adopted by popular vote, provided for the commission form of government with the usual divisions of administration into five departments respectively of Property, Finance, Safety, Improvements and Social Welfare. To some one of these commissionerships was assigned jurisdiction over each of the several county officers, as appropriately as the conditions would permit. The process of amalgamation was made complete when in May, 1916, Denver abandoned the commission plan and made the mayor chief executive of the county as well as of the city, with appropriate appointing power.