Complex sentence: Temple, x Leadville itself had lost much of its boomtown population and was becoming a ghost-town; here she often at night, dressed in a mixture of women's and men's clothing, wearing trousers and mining boots.
Split into simpler sentences: Temple, x At that time, Leadville itself had lost much of its boomtown population and was becoming a ghost-town. She often walked the empty streets at night, dressed in a mixture of women's and men's clothing, wearing trousers and mining boots.