Complex sentence: Doc left after hearing about gold being discovered in Wyoming, and on February 5,1876, he relocated to Cheyenne, working as a dealer for Babb's partner, Thomas Miller, who owned a saloon called the Bella Union.
Split into simpler sentences: Doc left after hearing about gold being discovered in Wyoming, and on February 5,1876, he relocated to Cheyenne. He found work as a dealer for Babb's partner, Thomas Miller, who owned a saloon called the Bella Union.