I've had this for as long as I can remember. Many of you probably already have it....but if you don't, it's indispensable stuff. If you have it but haven't dragged it out for a while, take a fresh look. The info on horizon lines saved my butt on many occasions.
It was drawn by Carson Van Osten, who I had the good fortune to work with briefly in the early 90s. I don't know where it was published, or if there was more of it - if anyone knows, please let us know.
Unfortunately the xerox I have of this next page got cut off. Luckily, the top part is reproduced in "The Illusion of Life" - just look up "Twins" in the index. Basically it's saying don't have a totally symmetrical pose - it flattens out the drawing and bleaches the life out of it. The part on the lower left is to say that if you have three characters running, come up with a different pose for each one, for variety and to add some life.