From the few photos they're showing of the inside, not much. It looks like your typical guest book wherein your guests sign it and not you. There clearly more pages than they're showing, but there's no way to know what's in it unless they upload more pics.
At first glance, I thought maybe but it actually looks more like Peter Freestone's hand. The capital R is very much a Peter over Freddie thing. There are a couple things written in some of the pages that are definitely Freddie, though. Not the majority