Code of Civil Procedure, 1908–Order 1, Rule 10–Order of impleadment as party–Appreciation of–Suit for specific performance of contract–Two agreements dated 30-7-2008 and 14-11-2008 were executed for the land in question–Both are criss-crossing the disputed zone of adjudication–Agreement dated 30-7-2008 was executed by father of respondents–Therefore, they can claim a right on the same land–Held, their impleadment was necessary.