References in classic literature ?
blacken them and to make them white; but it is most generally and
Seen through this pure ether, its brilliancy was so intolerable that Barbicane and his friends were obliged to blacken their glasses with the gas smoke before they could bear the splendor.
She was not desirous to mix up your name in the matter, of course, but her delight was, and still is, to blacken your sister's character to the utmost of her power, without risking too greatly the exposure of her own malevolence
This must be constantly looked to, or malice and envy will take care to blacken it so, that the sagacity and goodness of an Allworthy will not be able to see through it, and to discern the beauties within.
Having prepared his mind, by solitude and gloom, to prefer any society to the companionship of his own sad thoughts in such a dreary place, he was now slowly instilling into his soul the poison which he hoped would blacken it, and change its hue for ever.