I have used this alias for a while. It based on a children’s story “The Mouse and his Child” by Russell Hoban. HBO did an animated version of the story in the early 1980’s and that is how I came to know of it Basically it is story of a windup toy that consists of a mouse adult (a father) and a mouse child that are attached at the hands (remember it is a windup toy). They set off on an adventure to become “self-winding”. At one point in the adventure they get tossed into a stream. At the bottom of the stream was trash and debris including an empty can of dog food (named Bonz I believe). Anyway the Mouse and his child are trying to figure out how to get out of the stream – the child mouse is looking at the can of dog food – the can has picture of a dog holding a can of the dog food that has a picture of a dog holding a can of dog food that has a picture of a dog….ad infinitum. As I remember, a fish comes up and tells them they will find the answer if they look “beyond the Last Visible Dog” - sounded pithy so I started using it.