Mr. Potter from the book Did I Ever Tell You How Lucky You Are? Is a T-crosser and an I -dotter who resides in Van Nuys for some strange reason. In his factory, he has to cross T's and dot I's and that's a poor job for him. It's clearly unknown why he has to do this.
He has a pet cat who pops out a hole at the end of the video seen on the Dr Seuss video classic's version of the book.