advancement that has been achieved cannot, in our view, be allowed to take a roundabout turn and the march has only to be carried forward. If the claim of the appellant is viewed in the context and perspective outlined above, according to us, a perception of possible prejudice, if the documents or at least an inspection thereof is denied, looms large. The absence of any claim on the part of the accused to the said documents at any earlier point of time cannot have the effect of foreclosing such a right of the accused. Absence of such a claim, till the time when raised, can be understood and explained in several reasonable and acceptable ways. Suffice it would be to say that individual notion of prejudice, difficulty or handicap in putting forward a defence would vary from person to person and there can be no uniform yardstick to measure such perceptions. If the present appellant has perceived certain difficulties in answering or explaining some part of the evidence brought by the prosecution on the basis of specific documents and seeks to ascertain if the allegedly incriminating documents can be better explained by reference to some other documents which are in the court’s custody, an opportunity must be given to the accused to satisfy herself in this regard. It is not for the prosecution or for the court to comprehend the prejudice that is likely to be caused to the accused. The perception of prejudice is for the accused to develop and if the same is founded on a reasonable basis it is the duty of the court as well as the prosecution to ensure that the accused should not be made to labour under any such perception and the same must be put to rest at the earliest. Such a view, according to us, is an inalienable attribute of the process of a fair trial that Article 21 guarantees to every accused.