After the expiration of said time he may sell the same by public auction. Notice of such sale shall be given by posting notice thereof in two or more public places in the town where the property is situate, fourteen days before the sale, notice of the sale shall also be given to the general owner, at such time stating in writing the time and place of sale. The balance of the proceeds of sale, if any, after payment of the amount owing and reasonable expenses, shall be paid to the general owner on demand.