I have the complete series of Calvin n' Hobbes (3 books, about 10" thick total) that contains every strip ever created, including one that never went to the news papers. I can definitely tell you that it doesn't end like that, but I wonder if Watterson juggled an idea like that before the end?!
I have the collection The PreHistory of The Far Side: A 10th Anniversary Exhibit, and the sketchbook material is some of the most twisted stuff I have ever seen. And I've seen the Internet.
The Far Side comic is always classic, and lately I've seen a lot of copy cats who just can't live up to Larson and his work. Where'd you get that collection Studetdriver? I need to pick it up.