The search for Lincoln's "public man"

The Felt/Nixon revelations, currently in the news, have stimulated discussion about Lincoln's anonymous "public man" (as in "Diary of a Public Man"). "Stylometric analysis" seems to have failed - though you can download your own free stylometer here.

And here is the mysterious diary itself, awaiting your scrutiny. (Scroll down and note that there are four links.)

Have at it.