Section 18. Any party aggrieved by a finding or decision of the land court that the enforcement of any such restrictions or limitations would be injurious to the public interests may appeal therefrom to the supreme judicial court, which may draw from the facts and instruments stated in the record, findings or decision any inferences of fact that might have been drawn therefrom at a trial, and reverse or order such modification of said findings or decision as justice may require. The appeal shall be taken within twenty days after receipt of notice of the filing of such finding or decision, and further proceedings under the preceding section shall be suspended until after the determination of said appeal. If an appeal is not duly prosecuted, the finding or decision shall stand as if no appeal had been taken.