Sean,
The photo is accurate, I'm not so sure that the sketch is.
Of all the pictures I've seen of the hole, I've never seen a grassed mound in the green.
There is a ridge that runs through the green, seperating and defending a back hole location, but no mound.
A member called me tonight on another matter, I"ll call him back and ask him to investigate it for me.
The surrounding berm, which gave it a semi-punchbowl effect isn't as pronounced today. It's a feature I'd like to see restored. The green does tilt back to front to be more receptive to approaches, given the island nature of the green.
It's a neat hole.