If the City Treasurer has been unable to collect any of the city taxes on said roll on real property before the first day of March following the date when said roll was received by him, it shall be his duty to return all such unpaid taxes on real property to the County Treasurer in the same manner and with like effect as returns by township treasurers of township, school, and county taxes. Such returns shall be made upon a delinquent tax roll to be prepared by the City Treasurer and shall include all the additional charges and fees hereinbefore provided, which charges shall, in such return, be added to the amount assessed in said tax roll against each description. The taxes thus returned to the County Treasurer are collected under the provisions of the general laws of the state and shall be and remain a lien upon the lands against which they are assessed until paid.