What is unusual about the figure Robert Walton sees on the ice?

Robert Walton observes a mysterious figure on the ice that appears to be a man traveling across the frozen landscape. The figure is emaciated and near death, suggesting a harrowing journey. This encounter is unusual as it foreshadows the themes of isolation and ambition that permeate Mary Shelley's "Frankenstein," highlighting the extremes of human endeavor and the consequences of relentless pursuit. The figure ultimately turns out to be Victor Frankenstein, connecting their fates.