So, playing Assassin's Creed Origins last night, I was aimlessly wandering to just see what places I could discover and Roman camps or forts to infiltrate and wreak havoc upon. I had three major targets in which I was supposed to assassinate, and two of them had already fallen to my bow or my blade, so I wasn't in any hurry to find the last one. In fact, I had forgotten I was supposed to hunt him. But, as you'll see in the video, my aimless wandering and outright slaughter of Roman soldiers brought me into the final (and main) target's vicinity. Had he not entered the fight that was going on between his men and I, there is about a 98% chance that I would have just passed him by and he could have lived another few days or weeks, until I got around to actively pursuing him.
Oh well; happy accident I suppose...
video taken from Assassin's Creed Origins: The Hidden Ones (PS4)