It shall be the duty of the Town Sergeant to collect the taxes, fines and other income and revenue of the Town, as specified in his bond, and to account for and pay the same to the Treasurer at such times as the Council may order. And it shall be his duty, at least once in every three months, and oftener if required by the Council, to render an account of the taxes, fines and other claims in his hands for collection, and return a list of such as he shall have been unable to collect by reason of insolvency, to which list he shall make an oath that he has used due diligence to collect the same, but has been unable to do so. The Council shall, if it be satisfied that he could not have collected the same by the use of due diligence, allow them. But if the Council shall be of opinion that by the use of due diligence on the part of said Sergeant he could have collected the same, or any part thereof, then he shall be charged with such as he might have collected. The said Sergeant shall do and perform all other acts pertaining to the office of Sergeant of a corporation, and of a police officer within said Town, and as such shall have the same powers, duties, fees and liabilities as are by law prescribed for a constable when acting as such. He shall for his services receive such compensation as shall be fixed by the Council.