"Invisible ink" Quotes from Famous Books
 ... the Culpers were generally written in invisible ink, which was made legible by wetting the paper with another liquid. It was a matter of no small difficulty to keep the spies in New York supplied with the two fluids, and also with the guineas which were requisite for their maintenance. At first the spies wrote their letters on a blank sheet of ...
— Revolutionary Heroes, And Other Historical Papers • James Parton
... won't kill you, you swine!" he said. "You have got to find that paper. Then I'll see about it. Pick him up, somebody. I can't trust myself to touch him. Lost that paper—of course it is written in invisible ink; but suppose some blundering fool should get it ...
— The Boy Scouts on a Submarine • Captain John Blaine
... able to discover nothing more than this," said the doctor, with something like annoyance in his tone. "I do not know whether you have been writing with invisible ink. This is a mistake, Hamilton," he added, turning the blank sheet in all directions. "Where ...
— Louis' School Days - A Story for Boys • E. J. May |
