( 1 ) THIS appeal at the instance of the defendant No. 1 arises out of a suit filed by the plaintiffs, Sri Pronab Kumar Mukherjee and Sri Sukumar Banerjee, for specific performance of a contract for reconveyance of immovable property. The case made out in the plaint is that the plaintiffs are the sons of late Mohonanda Banerjee by his second wife, late Gayatri Debi. The pro-defendant no. 4, Sankari Debi, is the plaintiffs' step mother, being the first wife of late Mohonanda Banerjee and the pro-defendants nos. 2 and 3 are the plaintiffs' step-brothers. During the minority of the plaintiff no. 2 and the pro-defendants nos. 2 and 3, the plaintiff no. 1 for self and on behalf of the plaintiff no. 2 as the latter's guardian and the pro-defendant no. 4 for self and on behalf of the pro defendants nos. 2 and 3 as their guardian jointly sold the suit land to the principal defendant no. 1 by a registered Kobala dated 4. 11. 58 for a consideration of Rs. 1700/ -. On the same date, simultaneously with the sale, the principal defendantno. 1 executed and registered an Ekrarnama stipulating thereby a reconvey the self-same property in favour of the vendors for the sam