"Invisible ink" Quotes from Famous Books
 ... had come,' he said, 'to pay high for valuable noos, so I sold the enemy a very pretty de-vice. If you ever gave your mind to ciphers and illicit correspondence, Dick, you would know that the one kind of document you can't write on in invisible ink is a coated paper, the kind they use in the weeklies to print photographs of leading actresses and the stately homes of England. Anything wet that touches it corrugates the surface a little, and you can tell with a microscope if someone's been playing at it. Well, ...
— Mr. Standfast • John Buchan
... standing. "I know, for instance, that one week ago the plot which had your freedom for its purpose was born; I know the contents of every letter that passed between you and Miss Thorne here, notwithstanding the invisible ink; I know that four days ago several thousand dollars was smuggled in to you concealed in a basket of fruit; I know, with that money, you bribed your way out, while Miss Thorne or one of her agents ...
— Elusive Isabel • Jacques Futrelle
... can be used for a variety of purposes, and it has the merit of invisible ink of being made decipherable by quite a simple process which minimises the risk of accidental disclosure. The superintendent held the paper to the gas again for a few minutes. Then from a corner ...
— The Grell Mystery • Frank Froest
... circumvent the Post Office in this matter. Sometimes a series of words in the print of a newspaper were pricked with a pin, and thus conveyed a message to the person for whom the newspaper was intended. Sometimes milk was used as an invisible ink upon a newspaper, the receiver reading the message sent by holding the paper to the fire. At other times soldiers took the letters of their friends, and sent them under franks written by their officers. Letters were conveyed by public carriers, against ...
— A Hundred Years by Post - A Jubilee Retrospect • J. Wilson Hyde |
