Of course amongst the lowest races of savages such as the aborigines of Australia, even barter is almost unknown. Each man makes his own stone implements from the greenstone which is everywhere in abundance, his own clubs and boomerangs, whilst Nature supplies all his other wants.

Whymper’s Alaska, p. 225.

Morier, Murray’s Magazine, August, 1889, p. 181.

Jevons, Money, p. 24.

Tribes of California, p. 21.