<P> Holliday was still practicing dentistry from his room in Fort Griffin, Texas, and in Dodge City, Kansas . In an 1878 Dodge newspaper advertisement, he promised money back for less than complete customer satisfaction, but this was the last known time that he worked as a dentist . He gained the nickname "Doc" during this period . </P> <P> Holliday reportedly engaged in a gunfight with a bartender named Charles White . Miguel Otero, who would later become governor of New Mexico Territory, said he was present when Holliday walked into the saloon with a cocked revolver in his hand and challenged White to settle an outstanding argument . White was serving customers at the time and took cover behind a bar, then started shooting at Holliday with his revolver . During the fight, Holliday shot White in the scalp . But there are no contemporaneous newspaper reports of the incident . </P> <P> Bat Masterson reportedly said that Holliday was in Jacksonboro, South Carolina, and got into a gunfight with an unnamed soldier whom Holliday shot and killed . Historian Gary L. Roberts found a record for a Private Robert Smith who had been shot and killed by an "unknown assailant", but Holliday was never linked to the death . </P> <P> Holliday developed a reputation for his skill with a gun, as well as with the cards . In September 1879, Wyatt Earp resigned as assistant marshal in Dodge City and decided to join his brother Virgil in the Arizona Territory . </P>

What did doc holliday say at the end of tombstone