[Nomentatus]

Your comment is especially relevant re this quote from the original article: "Thus do we hear of Pepys’s plan to burn a compromising book so it won’t be found in his library, even though his library includes the diary in which he records the purchase and his plans to conceal it. It’s as if Pepys can’t suppress his compulsive candor."

Pepys wrote in a rare (Shelton) form of shorthand and then used code words as well, for further security. His writings were reasonably secure, in their time.