ORDER:- We are far from satisfied that the judgment covered by the Special Leave Petition, is correct. But, every error, even of law, does not justify exercise of Article 136.

2. The notice contemplated by the proviso to S. 21 of the U. P. Urban Buildings (Regulation of Letting, Rent and Eviction) Act, 1972 cannot be a casual or oral request to the tenant but a formal demand ordinarily in writing, and dearly insisting on vacant possession after the requisite period. We might have more closely examined, what appears to us to be an error of law in this regard, in the judgment of the High Court but we decline to grant leave, both because the party had not raised the point about the factum or legality of the notice in the trial court where evidence, one way or the other, could have been led, and also because an undertaking to the High Court to give vacant possession within six months, had been given by the petitioners, making the court believe that they would comply with that condition. However, we note further that the premises are small and the tenant a small man, paying a small rent with a large family residing with him. Having regard to this and other special circumstances of the ca