Original sentence: For 15 years, he sought gold around the world, from California to Australia.In 1898, Oakes left medical school before graduation and made his way to Alaska, at the height of the Klondike Gold Rush, in hopes of making his fortune as a prospector.On September 23, 1911, he registered the transfer of claim T-1663, purchased from5 from George Minaker, and established Lake Shore Mine; 20 years later the mine was the most productive in the Western Hemisphere, and ultimately proved to be the second-largest gold mine in the Americas
Edited sentence: For 15 years, he sought gold around the world from California to Australia.In 1898, Oakes left medical school before graduation and made his way to Alaska at the height of the Klondike Gold Rush in hopes of making his fortune as a prospector.In 1912, he struck gold there.Oakes established Lake Shore Mine to develop his gold; 20 years later the mine was the most productive in the Western Hemisphere, and ultimately proved to be the second-largest gold mine in the Americas