“It is not unknown to those who know any Thing of publike Affairs, of how great Concernment it is, especially in civill Commotions, for those who are to manage such Transactions, to be furnished with continuall Intelligence from their Correspondents, yet so as to conceal their Councells and Resolutions from the adverse Party. And to this Purpose, in all Ages, much Care and lndustry hath been still used, how in Matters of Consequence, to convey Intelligence safely and secretly to those with whom they hold Correspondence, so as not to bee intercepted by the Enemy, or if intercepted, at least not discovered. And as this is no where of more Concernment, so no where more difficult, than in civill Wars, where the intermingling of opposite Parties makes it difficult, if not impossible, to distinguish Friends and Foes.”
            p, 125 
An Essay on the Art of Decyphering (1737)
        
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                                John Wallis 34
English mathematician 1616–1703Related quotes
 
                            
                        
                        
                        
                                
                                
                                    Luc de Clapiers, Marquis de Vauvenargues
                                
                                
                                    (1715–1747) French writer, a moralist
                                
                                
                            
                            
                                
                                
                                Source: Reflections and Maxims (1746), p. 178.
                                
                                
                                    Kevin Carson
                                
                                
                                    (1963) American academic
                                
                                
                            
                            
                                
                                
                                
                                        
                                        Homebrew Industrial Revolution (2010), Chapter 7. 
Homebrew Industrial Revolution (2010)
                                    
 
        
     
                             
                             
                             
                             
                            