I've added some icons and wanted to shout out to lanning
2.
My dream this morning made me wonder how accurate watcher diaries are. So, a watcher is assigned a slayer and records details about her life and, less often, her death. Fine, cool. But the watcher diaries also have vampire histories in them with various amounts of detail. It would make sense for watchers to pore through diaries over a period of time to cull out references to a single vampire and then collect them into one biography-style volume--the history of Angelus, the history of Spike. It's unclear whether this is the case, though. I suppose Giles, in the episode "Angel," could use the term "watcher diary" to refer to some kind of supplemental volume that contains info on various vampires (e.g., "Vampires of the European Continent, 1719-1845"). He certainly has a lot of details--Angel's origins, his movements, hunting patterns, even his tattoo and a picture of a woman he'd once known. And we know that Wes has some very definitive accounts of his movements for certain periods of time.
And yet...how believable is that, if you extrapolate? There might be periods of time where the available info is richer; you can imagine a particular watcher gaining an "in" to a vampire social circle in some way, as a spy, or just being on the spot in the same small town, close enough to tail a particular vampire and record details. (And that must certainly account for a lot of watcher deaths over the years.) But it's less plausible that they'd have a close itinerary of a vampire's movements, month to month, for centuries at a time. At one point Giles says: "There's...no record of [Angel] hunting [in America]." He's talking about a period of over eighty years there. That's not saying much. If you wanted that to *really* mean something, you'd have to posit a network of watchers scattered across America, or watchers in England poring over a century's worth of American newspapers and noting down any report of a killing that resembles a vampire attack, and their work would have to represent a good accounting of which vampires are responsible for which killings. If they had *that* level of authoritative documentation, then saying that Angel has no record of hunting in America carries some weight. But it's highly unlikely they have that kind of info--and if a vamp is successful, a survivor, he's not going to be identified in association with a killing. So all that Giles is *really* saying here is that they've never had a meaningful report reach them to indicate that Angel was associated with a killing. He *could* have gone on a wild decade-long spree at any time, and as long as it didn't reach the attention of the watchers, they'd have no record of him hunting.
I just think that's kind of funny. I mean, it represents how the so-called "facts" we're presented with in canon can fall apart if you look at them too closely.
As another example, when I first watched "Fool for Love," I thought it implied that the story of Spike's "railroad-spike" torture was in fact apocrypha, a distortion of the truth, the truth being that his nickname, William the Bloody, in fact referred to his reputation for bloody awful poetry. It took me a while to twig to the alternate (and probably more sensible) reading, which is that he got the nickname when he was alive and then turned its meaning around by torturing the men who bestowed it on him. But I still kind of like the first reading, because it represents how tiny details of truth can be wildly exaggerated when they get set down as history. You can imagine some Victorian junior watcher interviewing William's contemporaries to get anecdotal material and then turning the very mundane facts of his life into the lurid melodrama of vampire notoriety.
3.
I can't remember what number three was.