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A Secret Correspondence By Means Of Invisible Ink

A person wishing to carry on a correspondence with another, and who is

fearful of having his letter opened, or intercepted, can adopt the

following plan:

Write any unimportant matter with common ink, and let the lines be

very wide apart: then between these lines write the communication you

wish to make, with any of the above invisible inks you can most

readily procure.

Your correspondent is to be previously apprized of the method of

making the characters visible: and writing in common ink will serve to

lull the suspicions of those who might intercept the letter, and who,

not finding any thing important in it, will either forward or keep it.

In either case there can be no danger, as the writing will not be

visible without the proper application.