I'm a bit behind on this obviously. Saturday was rather interrupted by a rugby game followed by a post-match meet up that was of course very very sober. So sober in fact that it weighed heavily upon my head for most of the next day. So I'm taking today as Saturday.
Where a historian has to rely on one document he is safe, but if there are two to be consulted he was in difficulty, and if three were available his position was hopeless.
A quote I've seen attributed to George Bernard Shaw but (as I mentioned recently) quotes are hard to verify and he's also one of those that tends to have these sort of saying attached to him. I've been unable to track it down definitively in the very small amount of whimsical time I've tried to do so in. But really most quotes are just as valid whether said by a famous wit or mumbled out a nonentities mouth (on a side note, I remember phsyics quote about not being able to distinguish between world class scientists and the ravings of drunks sleeping on park benches that came to mind during the recent faster than light kerfuffle, but unfortunately I couldn't find it again).