( 1 ) PLAINTIFF is the appellant in this appeal. Defendants 2 and 3 are minors and first defendant is the father of defendants 2 and 3. The suit is filed for specific performance of an agreement to sell, Ex. A-1, dated 19-9-1976. The agreed total consideration was Rs. 40,000/ -. The property sought to be purchased is mentioned in plaint a schedule and specified in Ex. A-2, plan, attached to the sale agreement, Ex. A-1. Plaint b schedule property was given as security for due performance of the sale agreement. The suit property consists of two shops with open space the total area being 150 square yards. Under the agreement, an amount of Rs. 1,000/- was paid as advance. Plaintiff lent money to defendants 1 to 3 on different occasions under the promissory notes, viz. , Ex. A-3 dated 14-2-1976 for Rs. 22,000/- and Ex. A-4 dated 6-3-1976 for Rs. 10,000/-, repayable with compound interest at 24% per annum. Plaintiff also claims that the agreement, Ex. A-1, was executed in discharge of the amounts due under the two promissory notes, Exs. A-3 and A-4, and the balance, if any, payable by the plaintiff should be paid at the time of registration of the sale deed, and the