2487. I have been instructed that regarded in itself the exterior memory is simply something organic formed from the objects of the senses-specially those of the sight and of the hearing-in the substances which are the beginnings of the fibers; and that according to the impressions from these objects are effected variations of form, which are reproduced; and that these forms are varied and changed according to the changes of the state of the affections and persuasions. Also that the interior memory is in like manner organic, but purer and more perfect, being formed from the objects of the interior sight; which objects are disposed into regular series, in an incomprehensible order.