According to Kate: The Legendary Life of Big Nose Kate, Love of Doc Holliday

Doc Holliday's paramour Big Nose Kate could never get a publisher to give her the big bucks she demanded to tell the story of her life, but that didn't mean she didn't collect material she wanted to use in a biography. Over the fifty years Mary Kate Cummings, alias Big Nose Kate, traversed the West she saved letters from her family, musings she had written about her love interests, and life with the notorious John Henry Holliday. Using rare, never before published material Big Nose Kate stock-piled in anticipation of writing the tale of her days on the Wild Frontier, the definitive book about the famous soiled dove will finally be told.

Kate claims to have witnessed the Gunfight at the OK Corral and exchanged words with the likes of Wyatt Earp and Josephine Marcus. There's no doubt she embellished her adventures, but that doesn't take away from their historical importance. She was a controversial figure in a rough and rowdy territory.

What she witnessed, the lifestyle she led, and the influential western people she met are fascinating and represent a time period much romanticized.