The supervisory lamp associated with the peg in the wanted subscriber's jack glows from the time that the peg is inserted until the subscriber responds, when it darkens, in which condition it remains until the subscriber restores the receiver to the hook and causes the lamp to light up again.
Nature then restores them very rapidly.
When he comes to the point where his memory has been clouded by Hagen's spells, Hagen restores his memory with another magic potion.
He is told of a weed which restores youth to the one grown old.
White probably restores the text almost to the state in which Jerome left it.
