This is without checking but I'm pretty certain 'Orderly' was a position in the army, not a rank as such, and this may be what the 'orderly book' means. Of course it could just mean a book for keeping things orderly or writing down orders. The other manuscript version was from a book that contained other types of info so the Boyd one might be similar. The New Bedford/Nantucket whaling journals famous for containing lots of songs from the 18thc also of course contained all sorts of other information.