17 Down Under:
17 DOWN UNDER. "A celebration of moderate grade climbing in Victoria". 184 pages. 285 images. Father & son team, Steve & John Morris, embark on a journey to climb and photograph 50 of the best rock climbs in Victoria, grade 17 & under. Inc bookmark $50.00
I would suggest that the old climb Overburden is what is now called The Joker. I know there's a couple of grades difference but that's neither here nor there in grading new routes. It's certainly about the middle of the cliff and the only likely candidate and they both tend to move right. I suspect the "white outcrop of rock" may be a tongue-in-cheek reference to the guano stains.