On the Tuesday next following the first Monday in November, A.D. 1902, and every four years thereafter, there shall be elected in said cities, in the manner provided by law for the election of city officers, a license collector, who shall hold his office for the term of four years, and until his successor is elected and qualified; he shall take the oath of office required of state officers, and give bond to such city in the sum of twenty-five thousand dollars, conditioned that he will faithfully and punctually collect and pay over all revenue for licenses and license tax collected and received by him, and in all things faithfully perform the duties of the office of license collector according to law and the ordinances of said city, to be approved by the mayor; and said oath and bond to be filed in the office of the city register of such city. Vacancies in said office of license collector from any cause shall be filled by the governor, from and until the end and expiration of the term in which the vacancy is created. Said license collector shall have his office in the city hall in such rooms as may be designated for the purpose by the proper authority.