Australia Felix Part IV delves into the lives of gold diggers portraying their struggles, dreams, and the harsh realities of the gold rush. The story begins with Long Jim, a miner reflecting on his own misfortunes after the tragic death of a fellow miner, Bill, who was buried in a cave-in. Jim's grief is not for Bill, but for his own failed search for wealth and the disappointment of his journey. His longing for home and regret for leaving behind his life as a lamplighter in England reveal his deep homesickness. As the narrative unfolds, it shifts to the bustling goldfields, where miners find themselves caught in the chaos of searching for fortune. The novel captures the tension between hope and despair, revealing how the diggers' dreams of wealth often clash with the harsh conditions and political unrest of the time. It paints a vivid picture of the gold rush era, illustrating the emotional and physical toll of those who sought fortune amidst uncertainty and hardship.