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.
It is the cache of someone from the organisation "The Harpers" or "Those Who Harp" with no doubt. Are you impling that I supposed to write "corpse of someone from the Harpers organisation" instead of "Harper's corpse"? They are normally called just Harpers for plural and Harper for singular. And either way this whole fact is irrelevant to what I'm talking about. Because I'm writing here about players route from opened piece of the landscape to some secret place. Seems you didn't read the rest of 3.2.
