“The classical requirement to establish adverse possession is that the possession should be nec vi nec clam nec precario . Here the possession on the part of the respondents is sufficiently overt and without an attempt at concealment, so that the person against whom time is running should if he exercises due vigilance, be aware of what is happening. Even if it is assumed that Ex.B-2 sale deed is void, in view of the evidence showing that the vendors are in open continuous and uninterrupted possession and enjoyment of the land since 1954, they have acquired title by adverse possession. In Venkatsubramania v. Sivagurunatha, A.I.R. 1938 Mad. 60, a Division Bench of this Court has held that adverse possession of an alienee dates from the moment the alienee is without lawful title. That time is, in the case of a void transfer, the date of the transfer. So, we find no reason to differ from the finding of the trial Court on this aspect.”