“Breaking the green wall”: so apt. My wife and I went on a tour along one shore of Roebuck Bay in Western Australia with one of the local Aboriginal elders.

What had, the say before, seemed like unimpressive, scrubby bushland transformed itself into larder of food, medicine and soap.

After a meal of shellfish, scraped off a rock and cooked on the coals, washed down with orange cordial and Madeira cake, I felt as proud as a kid with new knowledge when I broke off a few leaves and used them with water to lather up my hands and wash the stickiness off.