Hopedale also attacks paragraph four of the judgment on the basis that the remedy set out therein constitutes an impermissible revision of the land swap agreements. See e.g., Epdee Corp. v. Richmond, 321 Mass. 673, 675-676 (1947); Hook Brown Co. v. Farnsworth Press, Inc., 348 Mass. 306, 312-313 (1965); Van Dusen Aircraft Supplies of New England, Inc. v. Massachusetts Port Authy., 361 Mass. 131, 142-143 (1972); Sancta Maria Hosp. v. Cambridge, 369 Mass. 586, 595-596 (1976); King v. Allen, 5 Mass. App. Ct. 868, 870 (1977), all cases in which the relief ordered by the court was disallowed on appeal as it effectively altered the exchange between the parties. The remedy fashioned by the judge in the case before us violates no express terms of the land swap agreements.