Ahhhhh! The historical chestnut. You have written it very well. I've heard versions where Holmes counts off the clues and Watson says the punch line. [Watson has see the obvious at time], in which Holmes says just a few snarky feedback about Watson's intelligence, and even one where Lestrade strolls over, hears them extolling the view, casts his eyes upon the holes left with the aid of the tent pegs, and says, "anybody's nicked your tent, Mr. Holmes."