Golden Urchin — Madeleine Brent

IN THE SCORCHING AUSTRALIAN DESERT, A WILD, BEAUTIFUL WOMAN RESCUES A MAN FROM DEATH....
He was a handsome English aristocrat, sprawled in the dunes, dying of thirst. She was a white-skinned savage, fleeing the aborigine tribe that found her and raised her but still shunned the fiery-haired outcast.

AND DISCOVERS A STUNNING NEW LIFE
Suddenly Meg is able to escape her primitive life as Luke introduces her to the strange ways of Victorian England. In a search filled with adventure and excitement that spans three continents, Meg uncovers the clues to her true identity -- and realizes someone is trying to kill her. But the mysteries and secrets of the aborigines still pulse through the Victorian young lady, enabling Meg to triumph in the final desperate battle for survival and claim the only man she will ever love.