3.2. Harper's cache and Harper's lookout seem to be somewhat mixed up.
I think it's not the cache of someone named Harper, but from the organisation "The Harpers", or "Those Who Harp".
It is an organization mostly operating along the Sword Coast, with rather altruistic motives.
Like the Zhentarim, but (Neutral-)Good - aligned.
But I might be easily mistaken here, it has been a couple months since I last played the game.
