The purchase money or compensation to be paid for any lands to be purchased or taken by the promoters of the undertaking from any party who, by reason of absence from the kingdom, is prevented from treating, or who cannot after diligent inquiry be found, or who shall not appear at the time appointed for the inquiry before the jury, after due notice thereof, and the compensation to be paid for any permanent injury to such lands, shall be such as shall be determined by the valuation of such valuator as the sheriff shall nominate for that purpose, as hereinafter mentioned.