Ulysses was to be a player companion, who had to be cut from the game pre release, but is often mentioned, and may well turn up in a future DLC according to Chris Avelone. The plot of New Vegas which seemed to be only half done, could be attributed to the cutting of this guy, because he was supposed to be the courier who turned down the job when he saw your name on the list, as told by Johnathen Nash. I'm guessing it was intended that the reasoning and whatnot led to a much wider plot branch, but it had to be cut due to time. As another forumer mentioned, Wolfhorn ranch is Ulysses ranch in the Italian version, and he left to hunt down Elijah in the big empty. So, now with Elijah being dead, Ulysses may return to the mojave i'm guessing. Now, Iv'e just checked wikipedia. Remember the DLC achievment "hear about possible future adventures 1/5" yeah, that, well the Battle of the Divide is between 'the two couriers' the Divide being the Grand Canyon, leading to the Burning Man, and there are Burning Man lives slogans around the Mojave...Oh man my head hurts. Right, so Ulysses is hunting our PC courier, and this was supposed to be in the main game. I guess this explains all the unfinished and missing story content. From Wikipedia: "East of Primm there is a blocked route called Canyon Wreckage, it features graffiti saying "Lonesome-road", "Courier 6?" (complete with a yellow circle with an inverted 6 in the middle)and "You can go home Courier". More relevantly, the place name "the Divide" is also present here"