Things in Tombstone are really starting to sizzle.  The fuse is lit and the spark is burning its way towards that stack of TNT.  The bronco is bucking and won’t stop until… oh, yeah I’m sorry.  I’ll get back on track. I promised Alistair I would stay focused.  So, basically things in Tombstone are hot.  They get even hotter when Frank McLaury and Billy Clanton come riding into town.  There was a little debate about why they came to town.  The Earps stated that they received a telegram to come and help with the fight.  This is probably not likely, though, as the timeframe would have been impossibly fast for that.  They were probably coming into town to conduct business.  Picture Tombstone as a small little school.  You know how when things happen in school, the word spreads very fast.  This is also true for Tombstone at that time.  When Billy and Frank got to town, they heard about the events immediately.