As regards the physical object, paleographers and philologists, who _restore_ to texts their original physiognomy, _restorers_ of pictures and of statues, and similar categories of workers, exert themselves to preserve or to give back to the physical object all its primitive energy. These efforts certainly do not always succeed, or are not completely successful, for never, or hardly ever, is it possible to obtain a restoration complete in its smallest details. But the unsurmountable is only accidentally present, and cannot cause us to fail to recognize the favourable results which are nevertheless obtained. _Historical interpretation_ likewise labours to reintegrate in us historical conditions which have been altered in the course of history. It revives the dead, completes the fragmentary, and affords us the opportunity of seeing a work of art (a physical object) as its author saw it, at the moment of production. A condition of this historical labour is tradition, with the help of which it is possible to collect the scattered rays and cause them to converge on one centre. With the help of memory, we surround the physical stimulus with all the facts among which it arose; and thus we make it possible for it to react upon us, as it acted upon him who produced it. When the tradition is broken, interpretation is arrested; in this case, the products of the past remain _silent_ for us. Thus the expressions contained in the Etruscan or Messapian inscriptions are unattainable; thus we still hear discussions among ethnographers as to certain products of the art of savages, whether they be pictures or writings; thus archaeologists and prehistorians are not always able to establish with certainty, whether the figures found on the ceramic of a certain region, and on other instruments employed, be of a religious or of a profane nature. But the arrest of interpretation, as that of restoration, is never a definitely unsurmountable barrier; and the daily discoveries of historical sources and of new methods of better exploiting antiquity, which we may hope to see ever improving, link up broken tradition. We do not wish to deny that erroneous historical interpretation produces at times what we may term _palimpsests_, new expressions imposed upon the antique, artistic imaginings instead of historical reproductions. The so-called fascination of the past depends in part upon these expressions of ours, which we weave into historical expressions. Thus in hellenic plastic art has been discovered the calm and serene intuition of life of those peoples, who feel, nevertheless, so poignantly, the universality of sorrow; thus has recently been discerned on the faces of the Byzantine saints "the terror of the millennium," a terror which is an equivoke, or an artificial legend invented by modern scholars. But _historical criticism_ tends precisely to circumscribe _vain imaginings_ and to establish with exactitude the point of view from which we must look.