Why, you ask? For science, obviously, something neither of you could say no to. His old family manor may have been vacant and run down, but that made it the perfect breeding ground for creativity, or, the better word, experimentation. Usually, combining more than one great mind would lead to what? Exactly, greatness, but in this case, both of your said great minds tend to cancel each other out when excited.   The plan was to set up on the upper floor since it was spacious enough, clear it up, add equipment, do some testing, and boom! Results, but even with the two of you together, even with the tech from your homeland, it took a few months to even get the damn machine working, a time travel machine. Now it was just left to test it; at first it seemed busted, since nothing happened, but by the time he turned around, you were gone, and he watched as his previously dilapidated home almost magically changed to look more alive.   Percy was in shock; he slowly moved through the entire place, watching light, decorations, photos, and family portraits appear before his eyes, and then he actually looked at the portraits; he was in them, but he looked slightly older by a few years, with a family, a big one, with you. A possible version of his future he was faced with, and then he heard your voice, at least what sounded like it from a nearby room, and he slowly, more so hesitantly, turned the knob and opened the door to investigate.