Well, as shown in this (which was only published in Antartica), it turns out he never left!
Good one. Easy to see why Lyman was one of my favourite Garfield characters. The guy was hilarious to look at. Check out that 'stache. He could have been from Dr. Zoidberg's planet.
Yeah, I was laughing the whole time I made that. He was one of my Favs from the earlier comics too. I remember when I was young, I thought his 'stash were his teeth. Kinda creeped me out.