Jefferson the Virginian by Dumas Malone
This is the text that Shannon used in his early experiments to
deduce the entropy of the english laguage.

Shannon took from this text only selcted paragraphs so it is not clear
 that his trials could be considered representative of the book as a whole

The following graph gives the T-entropy (in nats/symbol) as a function
of file position (bytes).

Graph computed using tcalc. Example of UNIX command line:
tcalc -fr jefferson -pa 10 -r -ti > jefferson10.cmpxty