If no agreement be come to between the promoters of the undertaking and the owners of or parties by this Act enabled to sell and convey or release any lands taken or required for or injuriously affected by the execution of the undertaking, or any interest in such lands, as to the value of such lands or of any interest therein, or as to the compensation to be made in respect thereof, and if in any such case the compensation claimed shall not exceed fifty pounds, the same shall be settled by two justices.