Specific Relief Act, 1963–Sec. 12–Suit under –Dismissal of–Instant second appeal–Plaintiffs failed to prove the execution of agreement–Their application u/s. 90 of Evidence Act was rightly dismissed as they cannot be allowed to take the advantage of their own negligence and derelictory tactics–Concurrent findings of Courts below that neither they are in possession of the suit property nor they have proved the payment of sale consideration–No equity lies in their favour–Suit was rightly dismissed.