Gumang, or 'Greybeard', is the most senior elder of the Dharug people who call the country of the Hawkesbury region their home at the time of the arrival of the Thornhill family. He is a strong leader, and custodian of the traditions and rituals of his people.

When Will and Sal first arrive on 'Thornhill's Point', Greybeard tries in his own way to explain the 'rules' of sharing the land and river that is everyone's livelihood. If not happy about the new arrivals, he is at least tolerant. But as the settlers' way of doing things more and more transgresses his people's way, he encourages his tribe into escalating acts of protest.

Theft and destruction of property are not his natural way, but his dignity and responsibility as a leader mean he must challenge Will Thornhill head on if he and his people are to retain access to the country they have lived in since time immemorial.