Code of Civil Procedure, 1908–Order 14, Rule 1 & 5 r/w. Sec. 151–Burden to prove the amended issue was imposed on petitioner-plaintiff–Suit for cancellation of gift deed–Observation of trial Court that when the plaintiff wants to get the gift deed cancelled on the ground of undue influence or fraud, the burden of proving the undue influence always lies upon him–Further observation that it may shift during the course of the trial–Held, no illegality is found in the impugned order.