<font color=red>DON'T</font> leave diary entries by one person scattered over miles of corridors, buildings and countries. That?s not how a diary works. A diary tends to be all in one place. Most people, when journaling their lives, don?t tend to scribble it out on the nearest scrap of paper and then leave it wherever they wrote it. Because that would be utterly insane.
Yeah, but maybe the diary writer was insane. Actually, wouldn't that be more likely than not, otherwise there's no plot.