How interesting the contents of the journals are is dependent on how squeamish Raylan feels about autopsy reports. Not that're called as such here, of course - but the pages are filled with notes about the dead being cut up and examined. They're rather clinically detailed, in the total interest of somebody who's making notes of the weather.

There are a few points of interest should Raylan want to read further, but the most apparent thing that can be seen right now is the fact that the some of the names of the examined ones should look familiar. And they should, because those names match the list of names Raylan had just been looking through previously.