" Behold, a pale horse. " Johnny Ringo quotes Revelations, which Doc Holliday later completes during their showdown: "And hell followed with him".
If you are referring to an actual inscription for a physical tombstone, historical figures from the era often had distinctive epitaphs. For example, the real monument includes the humorous and surprisingly peaceful observation, " He died in bed ". subtitle Tombstone
" Wyatt Earp is my friend. " Doc's simple but powerful justification for his loyalty. " Behold, a pale horse
For a more "cosmopolitan" or intellectual subtitle, you could use a piece of the Latin duel between Doc and Ringo: In vino veritas ("In wine there is truth"). In pace requiescat ("Rest in peace"). For example, the real monument includes the humorous
Depending on the tone you want, here are several "pieces" of dialogue and themes often used in subtitles or marketing: